This quiz works best with JavaScript enabled. Home > Science > Chemistry – Quiz 64 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 64 (19 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which gas is used in fire extinguishers? A) Nitrogen oxide. B) Carbon dioxide. C) Sulpher dioxide. D) Carbon monoxide. Show Answer Correct Answer: B) Carbon dioxide. 2. The most electropositive elements among the following is A) Ca. B) Cs. C) Na. D) Br. Show Answer Correct Answer: B) Cs. 3. The energy-transfer molecule formed in cell respiration is A) DNA. B) Protein. C) Glucose. D) ATP. Show Answer Correct Answer: D) ATP. 4. Which of the following are the pre-existing nucleons that were produced after the explosion. A) Protons and Neutrons. B) Protons and electrons. C) Neutrons only. D) None of above. Show Answer Correct Answer: A) Protons and Neutrons. 5. All cell membranes are made of A) Phospholipids. B) DNA. C) Amino acids. D) Glucose. Show Answer Correct Answer: A) Phospholipids. 6. The charge of an electron is A) -2. B) -1. C) 0. D) +1. Show Answer Correct Answer: B) -1. 7. The nucleus of an atom contains A) Protons and electrons. B) Protons and neutrons. C) Electrons and neutrons. D) Only neutrons. Show Answer Correct Answer: B) Protons and neutrons. 8. What type of bond is formed when atoms share electrons? A) Covalent. B) Ionic. C) Hydrogen. D) Polyatomic. Show Answer Correct Answer: A) Covalent. 9. =The National Chemical Laboratory is situated in A) Pune. B) Patna. C) New Delhi. D) Bangalore. Show Answer Correct Answer: A) Pune. 10. The ratio of how much product is produced compared to how much is expected, expressed as a percentage. A) Limiting reactant. B) Excess reactant. C) Percent Yield. D) None of above. Show Answer Correct Answer: C) Percent Yield. 11. What charge do protons have? A) Positive. B) Neutral. C) Negative. D) None of above. Show Answer Correct Answer: A) Positive. 12. Which subatomic particle is neutral? A) Neutron. B) Positron. C) Proton. D) Electron. Show Answer Correct Answer: A) Neutron. 13. Balance the following equationDicarbon dihydride + Oxygen $\rightarrow$ Carbon dioxide + Water A) 2C2H4 + 5O2 $\rightarrow$ 3CO2 + 2H2O. B) 2C2H2 + 5O2 $\rightarrow$ 4CO2 + 2H2O. C) C2H2 + 3O2 $\rightarrow$ 2CO2 + 2H2O. D) 2CH4 + 3O2 $\rightarrow$ 2CO2 + 2H2O. Show Answer Correct Answer: B) 2C2H2 + 5O2 $\rightarrow$ 4CO2 + 2H2O. 14. The human body is made up of several chemical elements; the element present in the highest proportion (65 %) in the body is A) Oxygen. B) Carbon. C) Nitrogen. D) Hydrogen. Show Answer Correct Answer: A) Oxygen. 15. Which of the following represents a chemical change? A) Ice melting into water. B) Shattering glass. C) Salt dissolving into water. D) Rusting iron. Show Answer Correct Answer: D) Rusting iron. 16. A positively or negatively charged particle. A) Covalent bond. B) Compound. C) Ion. D) Chemical bond. Show Answer Correct Answer: C) Ion. 17. Soluble inorganic compounds whose ions conduct a current is solution are called A) Deoxyribonucleic acid. B) Proteins. C) Hydrophobic. D) Electrolytes. Show Answer Correct Answer: D) Electrolytes. 18. Under similar conditions of temperature and pressure equal volume of all gases contain equal number of molecules. This is A) Law of conservation of mass. B) Law of definite proportion. C) Law of multiple proportion. D) Avogadros law. Show Answer Correct Answer: D) Avogadros law. 19. X 1023 atoms of lithium (Li) is equal to how many moles? A) 1.18 moles. B) 0.351 moles. C) 1.34 moles. D) 0.849 moles. Show Answer Correct Answer: D) 0.849 moles. ← PreviousRelated QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9Chemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books