{"id":4922,"date":"2025-12-23T09:08:38","date_gmt":"2025-12-23T09:08:38","guid":{"rendered":"https:\/\/murreeroad.org\/?p=4922"},"modified":"2025-12-23T09:08:38","modified_gmt":"2025-12-23T09:08:38","slug":"chemistry-basics-mcqs-with-answers-100-multiple-choice-questions","status":"publish","type":"post","link":"https:\/\/learn-nest.murreeroad.org\/blog\/chemistry-basics-mcqs-with-answers-100-multiple-choice-questions\/","title":{"rendered":"Chemistry Basics MCQs with Answers (100 Multiple Choice Questions)"},"content":{"rendered":"<p>Practice <strong data-start=\"291\" data-end=\"333\">100 Chemistry Basics MCQs with answers<\/strong> covering atoms, elements, compounds, reactions, acids, bases, and the periodic table. Ideal for students, exams, and competitive test preparation.<\/p>\n<p>Chemistry Basics form the foundation for understanding matter, its composition, properties, and the changes it undergoes in everyday life. A strong grasp of fundamental concepts such as atoms, molecules, elements, compounds, chemical reactions, acids, bases, and the periodic table is essential for students and exam aspirants. This article presents <strong data-start=\"452\" data-end=\"513\">100 carefully designed Chemistry Basics <a href=\"https:\/\/murreeroad.org\/category\/mcqs\/\" target=\"_blank\" rel=\"noopener\">MCQs<\/a> with answers<\/strong>, aimed at strengthening core concepts, supporting quick revision, and improving exam readiness. These <strong data-start=\"616\" data-end=\"661\">basic chemistry <a href=\"https:\/\/studentnotes.murreeroad.org\/\" target=\"_blank\" rel=\"noopener\">multiple choice questions<\/a><\/strong> are ideal for school exams, competitive tests, and general science learning.<\/p>\n<p data-start=\"0\" data-end=\"167\">Below are <strong data-start=\"16\" data-end=\"48\">100 MCQs on Chemistry Basics<\/strong>, written in clear and correct <a href=\"https:\/\/studentnotes.murreeroad.org\/english\/?_gl=1*1scqeoq*_ga*MjEzMzkxMjMwOC4xNzY2NDI3MTMw*_ga_L8BW7PJ29P*czE3NjY0ODA2MjYkbzMkZzAkdDE3NjY0ODA2MjYkajYwJGwwJGgw\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"79\" data-end=\"90\">English<\/strong><\/a>, suitable for school exams, competitive exams, and general science practice.<\/p>\n<hr data-start=\"169\" data-end=\"172\" \/>\n<h2 data-start=\"174\" data-end=\"248\">\u2697\ufe0f Chemistry Basics \u2013 100 Multiple Choice Questions (MCQs) with Answers<\/h2>\n<h3 data-start=\"250\" data-end=\"283\">1. Chemistry is the study of:<\/h3>\n<p data-start=\"284\" data-end=\"376\">A. Living organisms<br data-start=\"303\" data-end=\"306\" \/>B. Matter and its changes<br data-start=\"331\" data-end=\"334\" \/>C. Energy only<br data-start=\"348\" data-end=\"351\" \/>D. Motion<br data-start=\"360\" data-end=\"363\" \/><strong data-start=\"363\" data-end=\"376\">Answer: B<\/strong><\/p>\n<h3 data-start=\"378\" data-end=\"413\">2. Matter is anything that has:<\/h3>\n<p data-start=\"414\" data-end=\"495\">A. Energy<br data-start=\"423\" data-end=\"426\" \/>B. Force<br data-start=\"434\" data-end=\"437\" \/>C. Mass and occupies space<br data-start=\"463\" data-end=\"466\" \/>D. Shape only<br data-start=\"479\" data-end=\"482\" \/><strong data-start=\"482\" data-end=\"495\">Answer: C<\/strong><\/p>\n<h3 data-start=\"497\" data-end=\"548\">3. Which of the following is a physical change?<\/h3>\n<p data-start=\"549\" data-end=\"646\">A. Burning of paper<br data-start=\"568\" data-end=\"571\" \/>B. Rusting of iron<br data-start=\"589\" data-end=\"592\" \/>C. Melting of ice<br data-start=\"609\" data-end=\"612\" \/>D. Cooking of food<br data-start=\"630\" data-end=\"633\" \/><strong data-start=\"633\" data-end=\"646\">Answer: C<\/strong><\/p>\n<h3 data-start=\"648\" data-end=\"699\">4. Which of the following is a chemical change?<\/h3>\n<p data-start=\"700\" data-end=\"792\">A. Freezing water<br data-start=\"717\" data-end=\"720\" \/>B. Dissolving sugar<br data-start=\"739\" data-end=\"742\" \/>C. Burning coal<br data-start=\"757\" data-end=\"760\" \/>D. Cutting paper<br data-start=\"776\" data-end=\"779\" \/><strong data-start=\"779\" data-end=\"792\">Answer: C<\/strong><\/p>\n<h3 data-start=\"794\" data-end=\"832\">5. The smallest unit of matter is:<\/h3>\n<p data-start=\"833\" data-end=\"894\">A. Molecule<br data-start=\"844\" data-end=\"847\" \/>B. Atom<br data-start=\"854\" data-end=\"857\" \/>C. Cell<br data-start=\"864\" data-end=\"867\" \/>D. Compound<br data-start=\"878\" data-end=\"881\" \/><strong data-start=\"881\" data-end=\"894\">Answer: B<\/strong><\/p>\n<hr data-start=\"896\" data-end=\"899\" \/>\n<h3 data-start=\"901\" data-end=\"930\">6. Atoms combine to form:<\/h3>\n<p data-start=\"931\" data-end=\"1002\">A. Elements<br data-start=\"942\" data-end=\"945\" \/>B. Compounds<br data-start=\"957\" data-end=\"960\" \/>C. Molecules<br data-start=\"972\" data-end=\"975\" \/>D. Mixtures<br data-start=\"986\" data-end=\"989\" \/><strong data-start=\"989\" data-end=\"1002\">Answer: C<\/strong><\/p>\n<h3 data-start=\"1004\" data-end=\"1042\">7. An element is a substance that:<\/h3>\n<p data-start=\"1043\" data-end=\"1190\">A. Can be broken down easily<br data-start=\"1071\" data-end=\"1074\" \/>B. Contains two or more elements<br data-start=\"1106\" data-end=\"1109\" \/>C. Cannot be broken into simpler substances<br data-start=\"1152\" data-end=\"1155\" \/>D. Is always liquid<br data-start=\"1174\" data-end=\"1177\" \/><strong data-start=\"1177\" data-end=\"1190\">Answer: C<\/strong><\/p>\n<h3 data-start=\"1192\" data-end=\"1236\">8. Which of the following is an element?<\/h3>\n<p data-start=\"1237\" data-end=\"1292\">A. Water<br data-start=\"1245\" data-end=\"1248\" \/>B. Air<br data-start=\"1254\" data-end=\"1257\" \/>C. Oxygen<br data-start=\"1266\" data-end=\"1269\" \/>D. Salt<br data-start=\"1276\" data-end=\"1279\" \/><strong data-start=\"1279\" data-end=\"1292\">Answer: C<\/strong><\/p>\n<h3 data-start=\"1294\" data-end=\"1325\">9. A compound is formed by:<\/h3>\n<p data-start=\"1326\" data-end=\"1431\">A. Physical mixing<br data-start=\"1344\" data-end=\"1347\" \/>B. Chemical combination<br data-start=\"1370\" data-end=\"1373\" \/>C. Mechanical separation<br data-start=\"1397\" data-end=\"1400\" \/>D. Heating only<br data-start=\"1415\" data-end=\"1418\" \/><strong data-start=\"1418\" data-end=\"1431\">Answer: B<\/strong><\/p>\n<h3 data-start=\"1433\" data-end=\"1478\">10. Which of the following is a compound?<\/h3>\n<p data-start=\"1479\" data-end=\"1541\">A. Oxygen<br data-start=\"1488\" data-end=\"1491\" \/>B. Hydrogen<br data-start=\"1502\" data-end=\"1505\" \/>C. Carbon<br data-start=\"1514\" data-end=\"1517\" \/>D. Water<br data-start=\"1525\" data-end=\"1528\" \/><strong data-start=\"1528\" data-end=\"1541\">Answer: D<\/strong><\/p>\n<hr data-start=\"1543\" data-end=\"1546\" \/>\n<h3 data-start=\"1548\" data-end=\"1586\">11. A mixture can be separated by:<\/h3>\n<p data-start=\"1587\" data-end=\"1690\">A. Chemical methods only<br data-start=\"1611\" data-end=\"1614\" \/>B. Physical methods<br data-start=\"1633\" data-end=\"1636\" \/>C. Nuclear methods<br data-start=\"1654\" data-end=\"1657\" \/>D. Atomic methods<br data-start=\"1674\" data-end=\"1677\" \/><strong data-start=\"1677\" data-end=\"1690\">Answer: B<\/strong><\/p>\n<h3 data-start=\"1692\" data-end=\"1721\">12. Air is an example of:<\/h3>\n<p data-start=\"1722\" data-end=\"1814\">A. Element<br data-start=\"1732\" data-end=\"1735\" \/>B. Compound<br data-start=\"1746\" data-end=\"1749\" \/>C. Homogeneous mixture<br data-start=\"1771\" data-end=\"1774\" \/>D. Heterogeneous mixture<br data-start=\"1798\" data-end=\"1801\" \/><strong data-start=\"1801\" data-end=\"1814\">Answer: C<\/strong><\/p>\n<h3 data-start=\"1816\" data-end=\"1874\">13. Which of the following is a heterogeneous mixture?<\/h3>\n<p data-start=\"1875\" data-end=\"1956\">A. Salt solution<br data-start=\"1891\" data-end=\"1894\" \/>B. Sugar solution<br data-start=\"1911\" data-end=\"1914\" \/>C. Air<br data-start=\"1920\" data-end=\"1923\" \/>D. Sand and water<br data-start=\"1940\" data-end=\"1943\" \/><strong data-start=\"1943\" data-end=\"1956\">Answer: D<\/strong><\/p>\n<h3 data-start=\"1958\" data-end=\"1989\">14. The SI unit of mass is:<\/h3>\n<p data-start=\"1990\" data-end=\"2049\">A. Gram<br data-start=\"1997\" data-end=\"2000\" \/>B. Kilogram<br data-start=\"2011\" data-end=\"2014\" \/>C. Pound<br data-start=\"2022\" data-end=\"2025\" \/>D. Tonne<br data-start=\"2033\" data-end=\"2036\" \/><strong data-start=\"2036\" data-end=\"2049\">Answer: B<\/strong><\/p>\n<h3 data-start=\"2051\" data-end=\"2089\">15. The SI unit of temperature is:<\/h3>\n<p data-start=\"2090\" data-end=\"2155\">A. Celsius<br data-start=\"2100\" data-end=\"2103\" \/>B. Fahrenheit<br data-start=\"2116\" data-end=\"2119\" \/>C. Kelvin<br data-start=\"2128\" data-end=\"2131\" \/>D. Joule<br data-start=\"2139\" data-end=\"2142\" \/><strong data-start=\"2142\" data-end=\"2155\">Answer: C<\/strong><\/p>\n<hr data-start=\"2157\" data-end=\"2160\" \/>\n<h3 data-start=\"2162\" data-end=\"2192\">16. Density is defined as:<\/h3>\n<p data-start=\"2193\" data-end=\"2282\">A. Mass \u00d7 volume<br data-start=\"2209\" data-end=\"2212\" \/>B. Volume \u00f7 mass<br data-start=\"2228\" data-end=\"2231\" \/>C. Mass \u00f7 volume<br data-start=\"2247\" data-end=\"2250\" \/>D. Mass + volume<br data-start=\"2266\" data-end=\"2269\" \/><strong data-start=\"2269\" data-end=\"2282\">Answer: C<\/strong><\/p>\n<h3 data-start=\"2284\" data-end=\"2343\">17. Which state of matter has a fixed shape and volume?<\/h3>\n<p data-start=\"2344\" data-end=\"2401\">A. Solid<br data-start=\"2352\" data-end=\"2355\" \/>B. Liquid<br data-start=\"2364\" data-end=\"2367\" \/>C. Gas<br data-start=\"2373\" data-end=\"2376\" \/>D. Plasma<br data-start=\"2385\" data-end=\"2388\" \/><strong data-start=\"2388\" data-end=\"2401\">Answer: A<\/strong><\/p>\n<h3 data-start=\"2403\" data-end=\"2469\">18. Which state of matter has no fixed shape but fixed volume?<\/h3>\n<p data-start=\"2470\" data-end=\"2527\">A. Solid<br data-start=\"2478\" data-end=\"2481\" \/>B. Liquid<br data-start=\"2490\" data-end=\"2493\" \/>C. Gas<br data-start=\"2499\" data-end=\"2502\" \/>D. Plasma<br data-start=\"2511\" data-end=\"2514\" \/><strong data-start=\"2514\" data-end=\"2527\">Answer: B<\/strong><\/p>\n<h3 data-start=\"2529\" data-end=\"2594\">19. Which state of matter has neither fixed shape nor volume?<\/h3>\n<p data-start=\"2595\" data-end=\"2649\">A. Solid<br data-start=\"2603\" data-end=\"2606\" \/>B. Liquid<br data-start=\"2615\" data-end=\"2618\" \/>C. Gas<br data-start=\"2624\" data-end=\"2627\" \/>D. Ice<br data-start=\"2633\" data-end=\"2636\" \/><strong data-start=\"2636\" data-end=\"2649\">Answer: C<\/strong><\/p>\n<h3 data-start=\"2651\" data-end=\"2701\">20. The change from solid to liquid is called:<\/h3>\n<p data-start=\"2702\" data-end=\"2777\">A. Freezing<br data-start=\"2713\" data-end=\"2716\" \/>B. Condensation<br data-start=\"2731\" data-end=\"2734\" \/>C. Melting<br data-start=\"2744\" data-end=\"2747\" \/>D. Evaporation<br data-start=\"2761\" data-end=\"2764\" \/><strong data-start=\"2764\" data-end=\"2777\">Answer: C<\/strong><\/p>\n<hr data-start=\"2779\" data-end=\"2782\" \/>\n<h3 data-start=\"2784\" data-end=\"2832\">21. The change from liquid to gas is called:<\/h3>\n<p data-start=\"2833\" data-end=\"2908\">A. Melting<br data-start=\"2843\" data-end=\"2846\" \/>B. Freezing<br data-start=\"2857\" data-end=\"2860\" \/>C. Condensation<br data-start=\"2875\" data-end=\"2878\" \/>D. Evaporation<br data-start=\"2892\" data-end=\"2895\" \/><strong data-start=\"2895\" data-end=\"2908\">Answer: D<\/strong><\/p>\n<h3 data-start=\"2910\" data-end=\"2958\">22. The change from gas to liquid is called:<\/h3>\n<p data-start=\"2959\" data-end=\"3038\">A. Evaporation<br data-start=\"2973\" data-end=\"2976\" \/>B. Condensation<br data-start=\"2991\" data-end=\"2994\" \/>C. Sublimation<br data-start=\"3008\" data-end=\"3011\" \/>D. Freezing<br data-start=\"3022\" data-end=\"3025\" \/><strong data-start=\"3025\" data-end=\"3038\">Answer: B<\/strong><\/p>\n<h3 data-start=\"3040\" data-end=\"3079\">23. Sublimation is the change from:<\/h3>\n<p data-start=\"3080\" data-end=\"3169\">A. Solid to gas<br data-start=\"3095\" data-end=\"3098\" \/>B. Gas to solid<br data-start=\"3113\" data-end=\"3116\" \/>C. Liquid to gas<br data-start=\"3132\" data-end=\"3135\" \/>D. Liquid to solid<br data-start=\"3153\" data-end=\"3156\" \/><strong data-start=\"3156\" data-end=\"3169\">Answer: A<\/strong><\/p>\n<h3 data-start=\"3171\" data-end=\"3213\">24. Which substance shows sublimation?<\/h3>\n<p data-start=\"3214\" data-end=\"3274\">A. Ice<br data-start=\"3220\" data-end=\"3223\" \/>B. Water<br data-start=\"3231\" data-end=\"3234\" \/>C. Naphthalene<br data-start=\"3248\" data-end=\"3251\" \/>D. Salt<br data-start=\"3258\" data-end=\"3261\" \/><strong data-start=\"3261\" data-end=\"3274\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3276\" data-end=\"3323\">25. Atomic number represents the number of:<\/h3>\n<p data-start=\"3324\" data-end=\"3403\">A. Neutrons<br data-start=\"3335\" data-end=\"3338\" \/>B. Electrons + protons<br data-start=\"3360\" data-end=\"3363\" \/>C. Protons<br data-start=\"3373\" data-end=\"3376\" \/>D. Nucleons<br data-start=\"3387\" data-end=\"3390\" \/><strong data-start=\"3390\" data-end=\"3403\">Answer: C<\/strong><\/p>\n<hr data-start=\"3405\" data-end=\"3408\" \/>\n<h3 data-start=\"3410\" data-end=\"3453\">26. Mass number is the total number of:<\/h3>\n<p data-start=\"3454\" data-end=\"3533\">A. Protons<br data-start=\"3464\" data-end=\"3467\" \/>B. Neutrons<br data-start=\"3478\" data-end=\"3481\" \/>C. Protons + neutrons<br data-start=\"3502\" data-end=\"3505\" \/>D. Electrons<br data-start=\"3517\" data-end=\"3520\" \/><strong data-start=\"3520\" data-end=\"3533\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3535\" data-end=\"3578\">27. The negatively charged particle is:<\/h3>\n<p data-start=\"3579\" data-end=\"3644\">A. Proton<br data-start=\"3588\" data-end=\"3591\" \/>B. Neutron<br data-start=\"3601\" data-end=\"3604\" \/>C. Electron<br data-start=\"3615\" data-end=\"3618\" \/>D. Nucleus<br data-start=\"3628\" data-end=\"3631\" \/><strong data-start=\"3631\" data-end=\"3644\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3646\" data-end=\"3689\">28. The positively charged particle is:<\/h3>\n<p data-start=\"3690\" data-end=\"3752\">A. Electron<br data-start=\"3701\" data-end=\"3704\" \/>B. Neutron<br data-start=\"3714\" data-end=\"3717\" \/>C. Proton<br data-start=\"3726\" data-end=\"3729\" \/>D. Atom<br data-start=\"3736\" data-end=\"3739\" \/><strong data-start=\"3739\" data-end=\"3752\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3754\" data-end=\"3776\">29. Neutrons have:<\/h3>\n<p data-start=\"3777\" data-end=\"3866\">A. Positive charge<br data-start=\"3795\" data-end=\"3798\" \/>B. Negative charge<br data-start=\"3816\" data-end=\"3819\" \/>C. No charge<br data-start=\"3831\" data-end=\"3834\" \/>D. Double charge<br data-start=\"3850\" data-end=\"3853\" \/><strong data-start=\"3853\" data-end=\"3866\">Answer: C<\/strong><\/p>\n<h3 data-start=\"3868\" data-end=\"3908\">30. The nucleus of an atom contains:<\/h3>\n<p data-start=\"3909\" data-end=\"4023\">A. Protons and electrons<br data-start=\"3933\" data-end=\"3936\" \/>B. Neutrons and electrons<br data-start=\"3961\" data-end=\"3964\" \/>C. Protons and neutrons<br data-start=\"3987\" data-end=\"3990\" \/>D. Only electrons<br data-start=\"4007\" data-end=\"4010\" \/><strong data-start=\"4010\" data-end=\"4023\">Answer: C<\/strong><\/p>\n<hr data-start=\"4025\" data-end=\"4028\" \/>\n<h3 data-start=\"4030\" data-end=\"4061\">31. Isotopes have the same:<\/h3>\n<p data-start=\"4062\" data-end=\"4165\">A. Mass number<br data-start=\"4076\" data-end=\"4079\" \/>B. Atomic number<br data-start=\"4095\" data-end=\"4098\" \/>C. Number of neutrons<br data-start=\"4119\" data-end=\"4122\" \/>D. Chemical properties only<br data-start=\"4149\" data-end=\"4152\" \/><strong data-start=\"4152\" data-end=\"4165\">Answer: B<\/strong><\/p>\n<h3 data-start=\"4167\" data-end=\"4224\">32. Which of the following is an isotope of hydrogen?<\/h3>\n<p data-start=\"4225\" data-end=\"4289\">A. Oxygen<br data-start=\"4234\" data-end=\"4237\" \/>B. Carbon<br data-start=\"4246\" data-end=\"4249\" \/>C. Deuterium<br data-start=\"4261\" data-end=\"4264\" \/>D. Helium<br data-start=\"4273\" data-end=\"4276\" \/><strong data-start=\"4276\" data-end=\"4289\">Answer: C<\/strong><\/p>\n<h3 data-start=\"4291\" data-end=\"4314\">33. Valency is the:<\/h3>\n<p data-start=\"4315\" data-end=\"4410\">A. Atomic mass<br data-start=\"4329\" data-end=\"4332\" \/>B. Combining capacity<br data-start=\"4353\" data-end=\"4356\" \/>C. Number of neutrons<br data-start=\"4377\" data-end=\"4380\" \/>D. Atomic size<br data-start=\"4394\" data-end=\"4397\" \/><strong data-start=\"4397\" data-end=\"4410\">Answer: B<\/strong><\/p>\n<h3 data-start=\"4412\" data-end=\"4454\">34. The chemical symbol for sodium is:<\/h3>\n<p data-start=\"4455\" data-end=\"4499\">A. Na<br data-start=\"4460\" data-end=\"4463\" \/>B. So<br data-start=\"4468\" data-end=\"4471\" \/>C. S<br data-start=\"4475\" data-end=\"4478\" \/>D. No<br data-start=\"4483\" data-end=\"4486\" \/><strong data-start=\"4486\" data-end=\"4499\">Answer: A<\/strong><\/p>\n<h3 data-start=\"4501\" data-end=\"4546\">35. The chemical symbol for potassium is:<\/h3>\n<p data-start=\"4547\" data-end=\"4590\">A. P<br data-start=\"4551\" data-end=\"4554\" \/>B. K<br data-start=\"4558\" data-end=\"4561\" \/>C. Pt<br data-start=\"4566\" data-end=\"4569\" \/>D. Po<br data-start=\"4574\" data-end=\"4577\" \/><strong data-start=\"4577\" data-end=\"4590\">Answer: B<\/strong><\/p>\n<hr data-start=\"4592\" data-end=\"4595\" \/>\n<h3 data-start=\"4597\" data-end=\"4641\">36. The periodic table was developed by:<\/h3>\n<p data-start=\"4642\" data-end=\"4708\">A. Dalton<br data-start=\"4651\" data-end=\"4654\" \/>B. Bohr<br data-start=\"4661\" data-end=\"4664\" \/>C. Mendeleev<br data-start=\"4676\" data-end=\"4679\" \/>D. Rutherford<br data-start=\"4692\" data-end=\"4695\" \/><strong data-start=\"4695\" data-end=\"4708\">Answer: C<\/strong><\/p>\n<h3 data-start=\"4710\" data-end=\"4752\">37. Modern periodic table is based on:<\/h3>\n<p data-start=\"4753\" data-end=\"4834\">A. Atomic mass<br data-start=\"4767\" data-end=\"4770\" \/>B. Atomic volume<br data-start=\"4786\" data-end=\"4789\" \/>C. Atomic number<br data-start=\"4805\" data-end=\"4808\" \/>D. Density<br data-start=\"4818\" data-end=\"4821\" \/><strong data-start=\"4821\" data-end=\"4834\">Answer: C<\/strong><\/p>\n<h3 data-start=\"4836\" data-end=\"4885\">38. Elements in the same group have the same:<\/h3>\n<p data-start=\"4886\" data-end=\"4978\">A. Atomic mass<br data-start=\"4900\" data-end=\"4903\" \/>B. Number of shells<br data-start=\"4922\" data-end=\"4925\" \/>C. Valence electrons<br data-start=\"4945\" data-end=\"4948\" \/>D. Atomic size<br data-start=\"4962\" data-end=\"4965\" \/><strong data-start=\"4965\" data-end=\"4978\">Answer: C<\/strong><\/p>\n<h3 data-start=\"4980\" data-end=\"5030\">39. Elements in the same period have the same:<\/h3>\n<p data-start=\"5031\" data-end=\"5123\">A. Valency<br data-start=\"5041\" data-end=\"5044\" \/>B. Number of shells<br data-start=\"5063\" data-end=\"5066\" \/>C. Atomic number<br data-start=\"5082\" data-end=\"5085\" \/>D. Chemical properties<br data-start=\"5107\" data-end=\"5110\" \/><strong data-start=\"5110\" data-end=\"5123\">Answer: B<\/strong><\/p>\n<h3 data-start=\"5125\" data-end=\"5158\">40. Noble gases are found in:<\/h3>\n<p data-start=\"5159\" data-end=\"5226\">A. Group 1<br data-start=\"5169\" data-end=\"5172\" \/>B. Group 2<br data-start=\"5182\" data-end=\"5185\" \/>C. Group 17<br data-start=\"5196\" data-end=\"5199\" \/>D. Group 18<br data-start=\"5210\" data-end=\"5213\" \/><strong data-start=\"5213\" data-end=\"5226\">Answer: D<\/strong><\/p>\n<hr data-start=\"5228\" data-end=\"5231\" \/>\n<h3 data-start=\"5233\" data-end=\"5275\">41. Which gas is most abundant in air?<\/h3>\n<p data-start=\"5276\" data-end=\"5349\">A. Oxygen<br data-start=\"5285\" data-end=\"5288\" \/>B. Carbon dioxide<br data-start=\"5305\" data-end=\"5308\" \/>C. Nitrogen<br data-start=\"5319\" data-end=\"5322\" \/>D. Hydrogen<br data-start=\"5333\" data-end=\"5336\" \/><strong data-start=\"5336\" data-end=\"5349\">Answer: C<\/strong><\/p>\n<h3 data-start=\"5351\" data-end=\"5389\">42. Which gas supports combustion?<\/h3>\n<p data-start=\"5390\" data-end=\"5463\">A. Nitrogen<br data-start=\"5401\" data-end=\"5404\" \/>B. Oxygen<br data-start=\"5413\" data-end=\"5416\" \/>C. Carbon dioxide<br data-start=\"5433\" data-end=\"5436\" \/>D. Hydrogen<br data-start=\"5447\" data-end=\"5450\" \/><strong data-start=\"5450\" data-end=\"5463\">Answer: B<\/strong><\/p>\n<h3 data-start=\"5465\" data-end=\"5506\">43. The chemical formula of water is:<\/h3>\n<p data-start=\"5507\" data-end=\"5556\">A. HO<br data-start=\"5512\" data-end=\"5515\" \/>B. H\u2082O<br data-start=\"5521\" data-end=\"5524\" \/>C. H\u2082O\u2082<br data-start=\"5531\" data-end=\"5534\" \/>D. OH\u2082<br data-start=\"5540\" data-end=\"5543\" \/><strong data-start=\"5543\" data-end=\"5556\">Answer: B<\/strong><\/p>\n<h3 data-start=\"5558\" data-end=\"5589\">44. Acids turn blue litmus:<\/h3>\n<p data-start=\"5590\" data-end=\"5645\">A. Red<br data-start=\"5596\" data-end=\"5599\" \/>B. Green<br data-start=\"5607\" data-end=\"5610\" \/>C. Yellow<br data-start=\"5619\" data-end=\"5622\" \/>D. Blue<br data-start=\"5629\" data-end=\"5632\" \/><strong data-start=\"5632\" data-end=\"5645\">Answer: A<\/strong><\/p>\n<h3 data-start=\"5647\" data-end=\"5677\">45. Bases turn red litmus:<\/h3>\n<p data-start=\"5678\" data-end=\"5733\">A. Blue<br data-start=\"5685\" data-end=\"5688\" \/>B. Green<br data-start=\"5696\" data-end=\"5699\" \/>C. Yellow<br data-start=\"5708\" data-end=\"5711\" \/>D. Red<br data-start=\"5717\" data-end=\"5720\" \/><strong data-start=\"5720\" data-end=\"5733\">Answer: A<\/strong><\/p>\n<hr data-start=\"5735\" data-end=\"5738\" \/>\n<h3 data-start=\"5740\" data-end=\"5782\">46. Which of the following is an acid?<\/h3>\n<p data-start=\"5783\" data-end=\"5837\">A. NaOH<br data-start=\"5790\" data-end=\"5793\" \/>B. KOH<br data-start=\"5799\" data-end=\"5802\" \/>C. HCl<br data-start=\"5808\" data-end=\"5811\" \/>D. Ca(OH)\u2082<br data-start=\"5821\" data-end=\"5824\" \/><strong data-start=\"5824\" data-end=\"5837\">Answer: C<\/strong><\/p>\n<h3 data-start=\"5839\" data-end=\"5880\">47. Which of the following is a base?<\/h3>\n<p data-start=\"5881\" data-end=\"5934\">A. H\u2082SO\u2084<br data-start=\"5889\" data-end=\"5892\" \/>B. HNO\u2083<br data-start=\"5899\" data-end=\"5902\" \/>C. NaOH<br data-start=\"5909\" data-end=\"5912\" \/>D. HCl<br data-start=\"5918\" data-end=\"5921\" \/><strong data-start=\"5921\" data-end=\"5934\">Answer: C<\/strong><\/p>\n<h3 data-start=\"5936\" data-end=\"5982\">48. The pH value of a neutral solution is:<\/h3>\n<p data-start=\"5983\" data-end=\"6025\">A. 0<br data-start=\"5987\" data-end=\"5990\" \/>B. 5<br data-start=\"5994\" data-end=\"5997\" \/>C. 7<br data-start=\"6001\" data-end=\"6004\" \/>D. 14<br data-start=\"6009\" data-end=\"6012\" \/><strong data-start=\"6012\" data-end=\"6025\">Answer: C<\/strong><\/p>\n<h3 data-start=\"6027\" data-end=\"6069\">49. A solution with pH less than 7 is:<\/h3>\n<p data-start=\"6070\" data-end=\"6130\">A. Neutral<br data-start=\"6080\" data-end=\"6083\" \/>B. Basic<br data-start=\"6091\" data-end=\"6094\" \/>C. Acidic<br data-start=\"6103\" data-end=\"6106\" \/>D. Salty<br data-start=\"6114\" data-end=\"6117\" \/><strong data-start=\"6117\" data-end=\"6130\">Answer: C<\/strong><\/p>\n<h3 data-start=\"6132\" data-end=\"6177\">50. A solution with pH greater than 7 is:<\/h3>\n<p data-start=\"6178\" data-end=\"6238\">A. Acidic<br data-start=\"6187\" data-end=\"6190\" \/>B. Neutral<br data-start=\"6200\" data-end=\"6203\" \/>C. Basic<br data-start=\"6211\" data-end=\"6214\" \/>D. Salty<br data-start=\"6222\" data-end=\"6225\" \/><strong data-start=\"6225\" data-end=\"6238\">Answer: C<\/strong><\/p>\n<hr data-start=\"6240\" data-end=\"6243\" \/>\n<p><a href=\"https:\/\/murreeroad.org\/plant-physiology-mcqs-with-answers-100-multiple-choice-questions\/\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-4916 size-large\" src=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/Plant-Physiology-1024x576.jpg\" alt=\"\" width=\"640\" height=\"360\" srcset=\"https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-1024x576.jpg 1024w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-300x169.jpg 300w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology-768x432.jpg 768w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Plant-Physiology.jpg 1280w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<hr data-start=\"6240\" data-end=\"6243\" \/>\n<h3 data-start=\"6245\" data-end=\"6279\">51. Common salt is chemically:<\/h3>\n<p data-start=\"6280\" data-end=\"6382\">A. Sodium chloride<br data-start=\"6298\" data-end=\"6301\" \/>B. Sodium carbonate<br data-start=\"6320\" data-end=\"6323\" \/>C. Calcium chloride<br data-start=\"6342\" data-end=\"6345\" \/>D. Potassium chloride<br data-start=\"6366\" data-end=\"6369\" \/><strong data-start=\"6369\" data-end=\"6382\">Answer: A<\/strong><\/p>\n<h3 data-start=\"6384\" data-end=\"6407\">52. Baking soda is:<\/h3>\n<p data-start=\"6408\" data-end=\"6466\">A. NaCl<br data-start=\"6415\" data-end=\"6418\" \/>B. Na\u2082CO\u2083<br data-start=\"6427\" data-end=\"6430\" \/>C. NaHCO\u2083<br data-start=\"6439\" data-end=\"6442\" \/>D. CaCO\u2083<br data-start=\"6450\" data-end=\"6453\" \/><strong data-start=\"6453\" data-end=\"6466\">Answer: C<\/strong><\/p>\n<h3 data-start=\"6468\" data-end=\"6492\">53. Washing soda is:<\/h3>\n<p data-start=\"6493\" data-end=\"6552\">A. NaHCO\u2083<br data-start=\"6502\" data-end=\"6505\" \/>B. Na\u2082CO\u2083<br data-start=\"6514\" data-end=\"6517\" \/>C. CaCO\u2083<br data-start=\"6525\" data-end=\"6528\" \/>D. K\u2082CO\u2083<br data-start=\"6536\" data-end=\"6539\" \/><strong data-start=\"6539\" data-end=\"6552\">Answer: B<\/strong><\/p>\n<h3 data-start=\"6554\" data-end=\"6582\">54. Lime water contains:<\/h3>\n<p data-start=\"6583\" data-end=\"6683\">A. Calcium oxide<br data-start=\"6599\" data-end=\"6602\" \/>B. Calcium hydroxide<br data-start=\"6622\" data-end=\"6625\" \/>C. Calcium carbonate<br data-start=\"6645\" data-end=\"6648\" \/>D. Sodium hydroxide<br data-start=\"6667\" data-end=\"6670\" \/><strong data-start=\"6670\" data-end=\"6683\">Answer: B<\/strong><\/p>\n<h3 data-start=\"6685\" data-end=\"6708\">55. Slaked lime is:<\/h3>\n<p data-start=\"6709\" data-end=\"6765\">A. CaO<br data-start=\"6715\" data-end=\"6718\" \/>B. CaCO\u2083<br data-start=\"6726\" data-end=\"6729\" \/>C. Ca(OH)\u2082<br data-start=\"6739\" data-end=\"6742\" \/>D. NaOH<br data-start=\"6749\" data-end=\"6752\" \/><strong data-start=\"6752\" data-end=\"6765\">Answer: C<\/strong><\/p>\n<hr data-start=\"6767\" data-end=\"6770\" \/>\n<h3 data-start=\"6772\" data-end=\"6805\">56. Rusting of iron requires:<\/h3>\n<p data-start=\"6806\" data-end=\"6899\">A. Water only<br data-start=\"6819\" data-end=\"6822\" \/>B. Oxygen only<br data-start=\"6836\" data-end=\"6839\" \/>C. Water and oxygen<br data-start=\"6858\" data-end=\"6861\" \/>D. Carbon dioxide only<br data-start=\"6883\" data-end=\"6886\" \/><strong data-start=\"6886\" data-end=\"6899\">Answer: C<\/strong><\/p>\n<h3 data-start=\"6901\" data-end=\"6928\">57. Rust is chemically:<\/h3>\n<p data-start=\"6929\" data-end=\"7017\">A. Iron oxide<br data-start=\"6942\" data-end=\"6945\" \/>B. Iron hydroxide<br data-start=\"6962\" data-end=\"6965\" \/>C. Iron carbonate<br data-start=\"6982\" data-end=\"6985\" \/>D. Iron chloride<br data-start=\"7001\" data-end=\"7004\" \/><strong data-start=\"7004\" data-end=\"7017\">Answer: A<\/strong><\/p>\n<h3 data-start=\"7019\" data-end=\"7040\">58. Corrosion is:<\/h3>\n<p data-start=\"7041\" data-end=\"7143\">A. Physical process<br data-start=\"7060\" data-end=\"7063\" \/>B. Chemical process<br data-start=\"7082\" data-end=\"7085\" \/>C. Nuclear process<br data-start=\"7103\" data-end=\"7106\" \/>D. Mechanical process<br data-start=\"7127\" data-end=\"7130\" \/><strong data-start=\"7130\" data-end=\"7143\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7145\" data-end=\"7205\">59. Galvanization prevents rusting by coating iron with:<\/h3>\n<p data-start=\"7206\" data-end=\"7263\">A. Copper<br data-start=\"7215\" data-end=\"7218\" \/>B. Zinc<br data-start=\"7225\" data-end=\"7228\" \/>C. Silver<br data-start=\"7237\" data-end=\"7240\" \/>D. Gold<br data-start=\"7247\" data-end=\"7250\" \/><strong data-start=\"7250\" data-end=\"7263\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7265\" data-end=\"7284\">60. Alloys are:<\/h3>\n<p data-start=\"7285\" data-end=\"7380\">A. Pure metals<br data-start=\"7299\" data-end=\"7302\" \/>B. Pure non-metals<br data-start=\"7320\" data-end=\"7323\" \/>C. Mixtures of metals<br data-start=\"7344\" data-end=\"7347\" \/>D. Compounds only<br data-start=\"7364\" data-end=\"7367\" \/><strong data-start=\"7367\" data-end=\"7380\">Answer: C<\/strong><\/p>\n<hr data-start=\"7382\" data-end=\"7385\" \/>\n<h3 data-start=\"7387\" data-end=\"7416\">61. Steel is an alloy of:<\/h3>\n<p data-start=\"7417\" data-end=\"7514\">A. Iron and copper<br data-start=\"7435\" data-end=\"7438\" \/>B. Iron and zinc<br data-start=\"7454\" data-end=\"7457\" \/>C. Iron and carbon<br data-start=\"7475\" data-end=\"7478\" \/>D. Iron and aluminum<br data-start=\"7498\" data-end=\"7501\" \/><strong data-start=\"7501\" data-end=\"7514\">Answer: C<\/strong><\/p>\n<h3 data-start=\"7516\" data-end=\"7545\">62. Brass is an alloy of:<\/h3>\n<p data-start=\"7546\" data-end=\"7645\">A. Copper and iron<br data-start=\"7564\" data-end=\"7567\" \/>B. Copper and zinc<br data-start=\"7585\" data-end=\"7588\" \/>C. Iron and zinc<br data-start=\"7604\" data-end=\"7607\" \/>D. Aluminum and copper<br data-start=\"7629\" data-end=\"7632\" \/><strong data-start=\"7632\" data-end=\"7645\">Answer: B<\/strong><\/p>\n<h3 data-start=\"7647\" data-end=\"7677\">63. Bronze is an alloy of:<\/h3>\n<p data-start=\"7678\" data-end=\"7776\">A. Copper and tin<br data-start=\"7695\" data-end=\"7698\" \/>B. Copper and zinc<br data-start=\"7716\" data-end=\"7719\" \/>C. Iron and carbon<br data-start=\"7737\" data-end=\"7740\" \/>D. Aluminum and iron<br data-start=\"7760\" data-end=\"7763\" \/><strong data-start=\"7763\" data-end=\"7776\">Answer: A<\/strong><\/p>\n<h3 data-start=\"7778\" data-end=\"7807\">64. Metals are generally:<\/h3>\n<p data-start=\"7808\" data-end=\"7899\">A. Brittle<br data-start=\"7818\" data-end=\"7821\" \/>B. Poor conductors<br data-start=\"7839\" data-end=\"7842\" \/>C. Malleable and ductile<br data-start=\"7866\" data-end=\"7869\" \/>D. Transparent<br data-start=\"7883\" data-end=\"7886\" \/><strong data-start=\"7886\" data-end=\"7899\">Answer: C<\/strong><\/p>\n<h3 data-start=\"7901\" data-end=\"7934\">65. Non-metals are generally:<\/h3>\n<p data-start=\"7935\" data-end=\"8010\">A. Ductile<br data-start=\"7945\" data-end=\"7948\" \/>B. Good conductors<br data-start=\"7966\" data-end=\"7969\" \/>C. Brittle<br data-start=\"7979\" data-end=\"7982\" \/>D. Malleable<br data-start=\"7994\" data-end=\"7997\" \/><strong data-start=\"7997\" data-end=\"8010\">Answer: C<\/strong><\/p>\n<hr data-start=\"8012\" data-end=\"8015\" \/>\n<h3 data-start=\"8017\" data-end=\"8067\">66. Which metal is liquid at room temperature?<\/h3>\n<p data-start=\"8068\" data-end=\"8130\">A. Sodium<br data-start=\"8077\" data-end=\"8080\" \/>B. Mercury<br data-start=\"8090\" data-end=\"8093\" \/>C. Iron<br data-start=\"8100\" data-end=\"8103\" \/>D. Aluminum<br data-start=\"8114\" data-end=\"8117\" \/><strong data-start=\"8117\" data-end=\"8130\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8132\" data-end=\"8186\">67. Which non-metal is liquid at room temperature?<\/h3>\n<p data-start=\"8187\" data-end=\"8255\">A. Sulfur<br data-start=\"8196\" data-end=\"8199\" \/>B. Phosphorus<br data-start=\"8212\" data-end=\"8215\" \/>C. Bromine<br data-start=\"8225\" data-end=\"8228\" \/>D. Chlorine<br data-start=\"8239\" data-end=\"8242\" \/><strong data-start=\"8242\" data-end=\"8255\">Answer: C<\/strong><\/p>\n<h3 data-start=\"8257\" data-end=\"8292\">68. The most reactive metal is:<\/h3>\n<p data-start=\"8293\" data-end=\"8353\">A. Iron<br data-start=\"8300\" data-end=\"8303\" \/>B. Copper<br data-start=\"8312\" data-end=\"8315\" \/>C. Potassium<br data-start=\"8327\" data-end=\"8330\" \/>D. Gold<br data-start=\"8337\" data-end=\"8340\" \/><strong data-start=\"8340\" data-end=\"8353\">Answer: C<\/strong><\/p>\n<h3 data-start=\"8355\" data-end=\"8391\">69. The least reactive metal is:<\/h3>\n<p data-start=\"8392\" data-end=\"8447\">A. Iron<br data-start=\"8399\" data-end=\"8402\" \/>B. Zinc<br data-start=\"8409\" data-end=\"8412\" \/>C. Copper<br data-start=\"8421\" data-end=\"8424\" \/>D. Gold<br data-start=\"8431\" data-end=\"8434\" \/><strong data-start=\"8434\" data-end=\"8447\">Answer: D<\/strong><\/p>\n<h3 data-start=\"8449\" data-end=\"8487\">70. Metals lose electrons to form:<\/h3>\n<p data-start=\"8488\" data-end=\"8555\">A. Anions<br data-start=\"8497\" data-end=\"8500\" \/>B. Neutrals<br data-start=\"8511\" data-end=\"8514\" \/>C. Cations<br data-start=\"8524\" data-end=\"8527\" \/>D. Molecules<br data-start=\"8539\" data-end=\"8542\" \/><strong data-start=\"8542\" data-end=\"8555\">Answer: C<\/strong><\/p>\n<hr data-start=\"8557\" data-end=\"8560\" \/>\n<h3 data-start=\"8562\" data-end=\"8604\">71. Non-metals gain electrons to form:<\/h3>\n<p data-start=\"8605\" data-end=\"8667\">A. Cations<br data-start=\"8615\" data-end=\"8618\" \/>B. Anions<br data-start=\"8627\" data-end=\"8630\" \/>C. Neutrals<br data-start=\"8641\" data-end=\"8644\" \/>D. Ions<br data-start=\"8651\" data-end=\"8654\" \/><strong data-start=\"8654\" data-end=\"8667\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8669\" data-end=\"8696\">72. Oxidation involves:<\/h3>\n<p data-start=\"8697\" data-end=\"8799\">A. Gain of electrons<br data-start=\"8717\" data-end=\"8720\" \/>B. Loss of electrons<br data-start=\"8740\" data-end=\"8743\" \/>C. Gain of neutrons<br data-start=\"8762\" data-end=\"8765\" \/>D. Loss of protons<br data-start=\"8783\" data-end=\"8786\" \/><strong data-start=\"8786\" data-end=\"8799\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8801\" data-end=\"8828\">73. Reduction involves:<\/h3>\n<p data-start=\"8829\" data-end=\"8931\">A. Loss of electrons<br data-start=\"8849\" data-end=\"8852\" \/>B. Gain of electrons<br data-start=\"8872\" data-end=\"8875\" \/>C. Loss of protons<br data-start=\"8893\" data-end=\"8896\" \/>D. Gain of neutrons<br data-start=\"8915\" data-end=\"8918\" \/><strong data-start=\"8918\" data-end=\"8931\">Answer: B<\/strong><\/p>\n<h3 data-start=\"8933\" data-end=\"8971\">74. Oxidation and reduction occur:<\/h3>\n<p data-start=\"8972\" data-end=\"9046\">A. Separately<br data-start=\"8985\" data-end=\"8988\" \/>B. Together<br data-start=\"8999\" data-end=\"9002\" \/>C. Alternately<br data-start=\"9016\" data-end=\"9019\" \/>D. Randomly<br data-start=\"9030\" data-end=\"9033\" \/><strong data-start=\"9033\" data-end=\"9046\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9048\" data-end=\"9099\">75. The substance that gets oxidized is called:<\/h3>\n<p data-start=\"9100\" data-end=\"9178\">A. Oxidizing agent<br data-start=\"9118\" data-end=\"9121\" \/>B. Reducing agent<br data-start=\"9138\" data-end=\"9141\" \/>C. Catalyst<br data-start=\"9152\" data-end=\"9155\" \/>D. Acid<br data-start=\"9162\" data-end=\"9165\" \/><strong data-start=\"9165\" data-end=\"9178\">Answer: B<\/strong><\/p>\n<hr data-start=\"9180\" data-end=\"9183\" \/>\n<h3 data-start=\"9185\" data-end=\"9204\">76. A catalyst:<\/h3>\n<p data-start=\"9205\" data-end=\"9324\">A. Takes part permanently<br data-start=\"9230\" data-end=\"9233\" \/>B. Is consumed<br data-start=\"9247\" data-end=\"9250\" \/>C. Changes rate without being consumed<br data-start=\"9288\" data-end=\"9291\" \/>D. Stops reaction<br data-start=\"9308\" data-end=\"9311\" \/><strong data-start=\"9311\" data-end=\"9324\">Answer: C<\/strong><\/p>\n<h3 data-start=\"9326\" data-end=\"9356\">77. Endothermic reactions:<\/h3>\n<p data-start=\"9357\" data-end=\"9449\">A. Release heat<br data-start=\"9372\" data-end=\"9375\" \/>B. Absorb heat<br data-start=\"9389\" data-end=\"9392\" \/>C. Do not involve heat<br data-start=\"9414\" data-end=\"9417\" \/>D. Produce light<br data-start=\"9433\" data-end=\"9436\" \/><strong data-start=\"9436\" data-end=\"9449\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9451\" data-end=\"9480\">78. Exothermic reactions:<\/h3>\n<p data-start=\"9481\" data-end=\"9574\">A. Absorb heat<br data-start=\"9495\" data-end=\"9498\" \/>B. Release heat<br data-start=\"9513\" data-end=\"9516\" \/>C. Do not involve energy<br data-start=\"9540\" data-end=\"9543\" \/>D. Absorb light<br data-start=\"9558\" data-end=\"9561\" \/><strong data-start=\"9561\" data-end=\"9574\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9576\" data-end=\"9611\">79. Chemical equations must be:<\/h3>\n<p data-start=\"9612\" data-end=\"9683\">A. Unbalanced<br data-start=\"9625\" data-end=\"9628\" \/>B. Balanced<br data-start=\"9639\" data-end=\"9642\" \/>C. Incomplete<br data-start=\"9655\" data-end=\"9658\" \/>D. Random<br data-start=\"9667\" data-end=\"9670\" \/><strong data-start=\"9670\" data-end=\"9683\">Answer: B<\/strong><\/p>\n<h3 data-start=\"9685\" data-end=\"9737\">80. Law of conservation of mass was proposed by:<\/h3>\n<p data-start=\"9738\" data-end=\"9801\">A. Dalton<br data-start=\"9747\" data-end=\"9750\" \/>B. Newton<br data-start=\"9759\" data-end=\"9762\" \/>C. Lavoisier<br data-start=\"9774\" data-end=\"9777\" \/>D. Boyle<br data-start=\"9785\" data-end=\"9788\" \/><strong data-start=\"9788\" data-end=\"9801\">Answer: C<\/strong><\/p>\n<hr data-start=\"9803\" data-end=\"9806\" \/>\n<h3 data-start=\"9808\" data-end=\"9838\">81. The mole is a unit of:<\/h3>\n<p data-start=\"9839\" data-end=\"9912\">A. Mass<br data-start=\"9846\" data-end=\"9849\" \/>B. Volume<br data-start=\"9858\" data-end=\"9861\" \/>C. Amount of substance<br data-start=\"9883\" data-end=\"9886\" \/>D. Density<br data-start=\"9896\" data-end=\"9899\" \/><strong data-start=\"9899\" data-end=\"9912\">Answer: C<\/strong><\/p>\n<h3 data-start=\"9914\" data-end=\"9943\">82. Avogadro\u2019s number is:<\/h3>\n<p data-start=\"9944\" data-end=\"10025\">A. 6.02 \u00d7 10\u00b2\u00b2<br data-start=\"9958\" data-end=\"9961\" \/>B. 6.02 \u00d7 10\u00b2\u00b3<br data-start=\"9975\" data-end=\"9978\" \/>C. 6.02 \u00d7 10\u00b2\u00b9<br data-start=\"9992\" data-end=\"9995\" \/>D. 6.02 \u00d7 10\u00b2\u2074<br data-start=\"10009\" data-end=\"10012\" \/><strong data-start=\"10012\" data-end=\"10025\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10027\" data-end=\"10062\">83. The molar mass of water is:<\/h3>\n<p data-start=\"10063\" data-end=\"10132\">A. 16 g\/mol<br data-start=\"10074\" data-end=\"10077\" \/>B. 17 g\/mol<br data-start=\"10088\" data-end=\"10091\" \/>C. 18 g\/mol<br data-start=\"10102\" data-end=\"10105\" \/>D. 20 g\/mol<br data-start=\"10116\" data-end=\"10119\" \/><strong data-start=\"10119\" data-end=\"10132\">Answer: C<\/strong><\/p>\n<h3 data-start=\"10134\" data-end=\"10156\">84. Solutions are:<\/h3>\n<p data-start=\"10157\" data-end=\"10239\">A. Pure substances<br data-start=\"10175\" data-end=\"10178\" \/>B. Mixtures<br data-start=\"10189\" data-end=\"10192\" \/>C. Elements<br data-start=\"10203\" data-end=\"10206\" \/>D. Compounds only<br data-start=\"10223\" data-end=\"10226\" \/><strong data-start=\"10226\" data-end=\"10239\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10241\" data-end=\"10279\">85. Solvent is the substance that:<\/h3>\n<p data-start=\"10280\" data-end=\"10354\">A. Dissolves<br data-start=\"10292\" data-end=\"10295\" \/>B. Is dissolved<br data-start=\"10310\" data-end=\"10313\" \/>C. Reacts<br data-start=\"10322\" data-end=\"10325\" \/>D. Evaporates<br data-start=\"10338\" data-end=\"10341\" \/><strong data-start=\"10341\" data-end=\"10354\">Answer: A<\/strong><\/p>\n<hr data-start=\"10356\" data-end=\"10359\" \/>\n<h3 data-start=\"10361\" data-end=\"10398\">86. Solute is the substance that:<\/h3>\n<p data-start=\"10399\" data-end=\"10484\">A. Dissolves<br data-start=\"10411\" data-end=\"10414\" \/>B. Is dissolved<br data-start=\"10429\" data-end=\"10432\" \/>C. Does not dissolve<br data-start=\"10452\" data-end=\"10455\" \/>D. Evaporates<br data-start=\"10468\" data-end=\"10471\" \/><strong data-start=\"10471\" data-end=\"10484\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10486\" data-end=\"10524\">87. A saturated solution contains:<\/h3>\n<p data-start=\"10525\" data-end=\"10606\">A. No solute<br data-start=\"10537\" data-end=\"10540\" \/>B. Maximum solute<br data-start=\"10557\" data-end=\"10560\" \/>C. Less solute<br data-start=\"10574\" data-end=\"10577\" \/>D. No solvent<br data-start=\"10590\" data-end=\"10593\" \/><strong data-start=\"10593\" data-end=\"10606\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10608\" data-end=\"10643\">88. Crystallization is used to:<\/h3>\n<p data-start=\"10644\" data-end=\"10732\">A. Mix substances<br data-start=\"10661\" data-end=\"10664\" \/>B. Purify solids<br data-start=\"10680\" data-end=\"10683\" \/>C. Heat solutions<br data-start=\"10700\" data-end=\"10703\" \/>D. Form gases<br data-start=\"10716\" data-end=\"10719\" \/><strong data-start=\"10719\" data-end=\"10732\">Answer: B<\/strong><\/p>\n<h3 data-start=\"10734\" data-end=\"10775\">89. Distillation is used to separate:<\/h3>\n<p data-start=\"10776\" data-end=\"10876\">A. Solids<br data-start=\"10785\" data-end=\"10788\" \/>B. Two solids<br data-start=\"10801\" data-end=\"10804\" \/>C. Liquids with different boiling points<br data-start=\"10844\" data-end=\"10847\" \/>D. Gases only<br data-start=\"10860\" data-end=\"10863\" \/><strong data-start=\"10863\" data-end=\"10876\">Answer: C<\/strong><\/p>\n<h3 data-start=\"10878\" data-end=\"10917\">90. Filtration is used to separate:<\/h3>\n<p data-start=\"10918\" data-end=\"10997\">A. Two liquids<br data-start=\"10932\" data-end=\"10935\" \/>B. Solid from liquid<br data-start=\"10955\" data-end=\"10958\" \/>C. Gases<br data-start=\"10966\" data-end=\"10969\" \/>D. Solutions<br data-start=\"10981\" data-end=\"10984\" \/><strong data-start=\"10984\" data-end=\"10997\">Answer: B<\/strong><\/p>\n<hr data-start=\"10999\" data-end=\"11002\" \/>\n<h3 data-start=\"11004\" data-end=\"11047\">91. Chromatography is used to separate:<\/h3>\n<p data-start=\"11048\" data-end=\"11135\">A. Metals<br data-start=\"11057\" data-end=\"11060\" \/>B. Insoluble solids<br data-start=\"11079\" data-end=\"11082\" \/>C. Colored substances<br data-start=\"11103\" data-end=\"11106\" \/>D. Gases only<br data-start=\"11119\" data-end=\"11122\" \/><strong data-start=\"11122\" data-end=\"11135\">Answer: C<\/strong><\/p>\n<h3 data-start=\"11137\" data-end=\"11177\">92. Evaporation helps in separating:<\/h3>\n<p data-start=\"11178\" data-end=\"11285\">A. Solids from solids<br data-start=\"11199\" data-end=\"11202\" \/>B. Liquids from liquids<br data-start=\"11225\" data-end=\"11228\" \/>C. Soluble solids from liquids<br data-start=\"11258\" data-end=\"11261\" \/>D. Gases<br data-start=\"11269\" data-end=\"11272\" \/><strong data-start=\"11272\" data-end=\"11285\">Answer: C<\/strong><\/p>\n<h3 data-start=\"11287\" data-end=\"11325\">93. The boiling point of water is:<\/h3>\n<p data-start=\"11326\" data-end=\"11380\">A. 0\u00b0C<br data-start=\"11332\" data-end=\"11335\" \/>B. 50\u00b0C<br data-start=\"11342\" data-end=\"11345\" \/>C. 100\u00b0C<br data-start=\"11353\" data-end=\"11356\" \/>D. 150\u00b0C<br data-start=\"11364\" data-end=\"11367\" \/><strong data-start=\"11367\" data-end=\"11380\">Answer: C<\/strong><\/p>\n<h3 data-start=\"11382\" data-end=\"11417\">94. Freezing point of water is:<\/h3>\n<p data-start=\"11418\" data-end=\"11472\">A. 100\u00b0C<br data-start=\"11426\" data-end=\"11429\" \/>B. 50\u00b0C<br data-start=\"11436\" data-end=\"11439\" \/>C. 0\u00b0C<br data-start=\"11445\" data-end=\"11448\" \/>D. \u201310\u00b0C<br data-start=\"11456\" data-end=\"11459\" \/><strong data-start=\"11459\" data-end=\"11472\">Answer: C<\/strong><\/p>\n<h3 data-start=\"11474\" data-end=\"11500\">95. Pure water has pH:<\/h3>\n<p data-start=\"11501\" data-end=\"11543\">A. 0<br data-start=\"11505\" data-end=\"11508\" \/>B. 5<br data-start=\"11512\" data-end=\"11515\" \/>C. 7<br data-start=\"11519\" data-end=\"11522\" \/>D. 14<br data-start=\"11527\" data-end=\"11530\" \/><strong data-start=\"11530\" data-end=\"11543\">Answer: C<\/strong><\/p>\n<hr data-start=\"11545\" data-end=\"11548\" \/>\n<h3 data-start=\"11550\" data-end=\"11583\">96. The universal solvent is:<\/h3>\n<p data-start=\"11584\" data-end=\"11645\">A. Alcohol<br data-start=\"11594\" data-end=\"11597\" \/>B. Water<br data-start=\"11605\" data-end=\"11608\" \/>C. Acetone<br data-start=\"11618\" data-end=\"11621\" \/>D. Ether<br data-start=\"11629\" data-end=\"11632\" \/><strong data-start=\"11632\" data-end=\"11645\">Answer: B<\/strong><\/p>\n<h3 data-start=\"11647\" data-end=\"11685\">97. Chemistry helps us understand:<\/h3>\n<p data-start=\"11686\" data-end=\"11779\">A. Life processes<br data-start=\"11703\" data-end=\"11706\" \/>B. Matter and reactions<br data-start=\"11729\" data-end=\"11732\" \/>C. Motion only<br data-start=\"11746\" data-end=\"11749\" \/>D. Energy only<br data-start=\"11763\" data-end=\"11766\" \/><strong data-start=\"11766\" data-end=\"11779\">Answer: B<\/strong><\/p>\n<h3 data-start=\"11781\" data-end=\"11829\">98. The study of carbon compounds is called:<\/h3>\n<p data-start=\"11830\" data-end=\"11941\">A. Inorganic chemistry<br data-start=\"11852\" data-end=\"11855\" \/>B. Physical chemistry<br data-start=\"11876\" data-end=\"11879\" \/>C. Organic chemistry<br data-start=\"11899\" data-end=\"11902\" \/>D. Analytical chemistry<br data-start=\"11925\" data-end=\"11928\" \/><strong data-start=\"11928\" data-end=\"11941\">Answer: C<\/strong><\/p>\n<h3 data-start=\"11943\" data-end=\"11982\">99. Inorganic chemistry deals with:<\/h3>\n<p data-start=\"11983\" data-end=\"12080\">A. Living organisms<br data-start=\"12002\" data-end=\"12005\" \/>B. Carbon compounds only<br data-start=\"12029\" data-end=\"12032\" \/>C. Non-carbon compounds<br data-start=\"12055\" data-end=\"12058\" \/>D. DNA<br data-start=\"12064\" data-end=\"12067\" \/><strong data-start=\"12067\" data-end=\"12080\">Answer: C<\/strong><\/p>\n<h3 data-start=\"12082\" data-end=\"12128\">100. Chemistry plays an important role in:<\/h3>\n<p data-start=\"12129\" data-end=\"12205\">A. Medicine<br data-start=\"12140\" data-end=\"12143\" \/>B. Industry<br data-start=\"12154\" data-end=\"12157\" \/>C. Environment<br data-start=\"12171\" data-end=\"12174\" \/>D. All of these<br data-start=\"12189\" data-end=\"12192\" \/><strong data-start=\"12192\" data-end=\"12205\">Answer: D<\/strong><\/p>\n<p data-start=\"12129\" data-end=\"12205\"><a href=\"https:\/\/rgsoftwares.com\/school-management-software\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4896\" src=\"https:\/\/murreeroad.org\/wp-content\/uploads\/2025\/12\/School-Management-software-1.png\" alt=\"\" width=\"1500\" height=\"98\" srcset=\"https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1.png 1500w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1-300x20.png 300w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1-1024x67.png 1024w, https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/School-Management-software-1-768x50.png 768w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Practice 100 Chemistry Basics MCQs with answers covering atoms, elements, compounds, reactions, acids, bases, and the periodic table. Ideal for students, exams, and competitive test preparation. Chemistry Basics form the foundation for understanding matter, its composition, properties, and the changes it undergoes in everyday life. A strong grasp of fundamental concepts such as atoms, molecules, &#8230; <a title=\"Chemistry Basics MCQs with Answers (100 Multiple Choice Questions)\" class=\"read-more\" href=\"https:\/\/learn-nest.murreeroad.org\/blog\/chemistry-basics-mcqs-with-answers-100-multiple-choice-questions\/\" aria-label=\"Read more about Chemistry Basics MCQs with Answers (100 Multiple Choice Questions)\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":4923,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowprK_DA:productID":"","om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2106],"tags":[2121,2796,2792,2797,2800,2790,2795,2791,2793,2794,2799,2803,2805,2798,2804,2801,2802,2806],"class_list":["post-4922","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mcqs","tag-100-multiple-choice-questions","tag-atoms-and-molecules-mcqs","tag-basic-chemistry-questions","tag-chemical-reactions-mcqs","tag-chemistry-basics","tag-chemistry-basics-mcqs","tag-chemistry-exam-preparation","tag-chemistry-mcqs-with-answers","tag-chemistry-multiple-choice-questions","tag-chemistry-practice-test","tag-chemistry-quiz-for-students","tag-neutrons","tag-noble-gases","tag-periodic-table-mcqs","tag-the-chemical-symbol-for-sodium","tag-the-si-unit-of-mass","tag-the-si-unit-of-temperature","tag-washing-soda"],"aioseo_notices":[],"uagb_featured_image_src":{"full":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions.png",1536,1024,false],"thumbnail":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions-150x150.png",150,150,true],"medium":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions-300x200.png",300,200,true],"medium_large":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions-768x512.png",768,512,true],"large":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions-1024x683.png",1024,683,true],"1536x1536":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions.png",1536,1024,false],"2048x2048":["https:\/\/learn-nest.murreeroad.org\/blog\/wp-content\/uploads\/2025\/12\/Chemistry-Basics-MCQs-with-Answers-100-Multiple-Choice-Questions.png",1536,1024,false]},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/learn-nest.murreeroad.org\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Practice 100 Chemistry Basics MCQs with answers covering atoms, elements, compounds, reactions, acids, bases, and the periodic table. Ideal for students, exams, and competitive test preparation. Chemistry Basics form the foundation for understanding matter, its composition, properties, and the changes it undergoes in everyday life. A strong grasp of fundamental concepts such as atoms, molecules,&hellip;","_links":{"self":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/4922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/comments?post=4922"}],"version-history":[{"count":1,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/4922\/revisions"}],"predecessor-version":[{"id":4924,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/posts\/4922\/revisions\/4924"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/media\/4923"}],"wp:attachment":[{"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/media?parent=4922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/categories?post=4922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-nest.murreeroad.org\/blog\/wp-json\/wp\/v2\/tags?post=4922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}