This quiz works best with JavaScript enabled. Home > Science > Chemistry – Quiz 45 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 45 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A sample of acid has a proton concentration 1, 000 times greater than pure water. A sample of base has a proton concentration 10, 000 times less than pure water. What is the approximate pH of two samples? A) 4, 11. B) 10, 3. C) 11, 4. D) 3, 10. Show Answer Correct Answer: A) 4, 11. 2. Which one of the following gas is readily soluble in water at room temperature? A) Chlorine. B) Nitrogen. C) Ammonia. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 3. Candela is the SI unit of which physical quantity A) Amount of substance. B) Pressure. C) Force. D) Luminous intensity. Show Answer Correct Answer: D) Luminous intensity. 4. Which would weigh more, a mole of atoms of H or a mole of atoms of He? A) A mole of atoms of H. B) A mole of atoms of He. C) They are the same. D) 6.02 x 1023. Show Answer Correct Answer: B) A mole of atoms of He. 5. Two or more atoms linked together to make a substance with unique properties A) Atom. B) Molecule. C) Mixture. D) Matter. Show Answer Correct Answer: B) Molecule. 6. Electrons are ..... in covalent bonds. A) Shared. B) Transferred. C) Given up. D) Lost. Show Answer Correct Answer: A) Shared. 7. Anything that cannot be broken down through physical means A) Mixture. B) Pure substance. C) Compound. D) Elements. Show Answer Correct Answer: B) Pure substance. 8. What is the complete name of the Dutch Chemists in which the other term for intermolecular forces is name after him? A) Johannes Diderik Van der Waals. B) Johanes Diderik Van der Waals. C) Johannes Dedirik Van der Waals. D) Johannes Dedirik Van der Wals. Show Answer Correct Answer: A) Johannes Diderik Van der Waals. 9. Science that deals with matter and energy and the interactions between them. A) Chemistry. B) Physics. C) Biology. D) None of above. Show Answer Correct Answer: B) Physics. 10. What is an ion? A) A small atom. B) A large atom. C) A neutral atom. D) A charged atom. Show Answer Correct Answer: D) A charged atom. 11. Mass and ..... are always conserved in a chemical reaction. A) Particles. B) Ions. C) Elements. D) Atoms. Show Answer Correct Answer: D) Atoms. 12. What kind of property results in the substance into changing into a new substance? A) Chemical property. B) Liquid property. C) Physical property. D) Real property. Show Answer Correct Answer: A) Chemical property. 13. Water has an unusually high boiling point for a molecular compound because it has A) Hydrogen bonding. B) Ion-ion attractions. C) A high density. D) A large gram formula mass. Show Answer Correct Answer: A) Hydrogen bonding. 14. How many valence electrons does an atom of chlorine have? A) 17. B) 7. C) 3. D) 2. Show Answer Correct Answer: B) 7. 15. How many Hydrogen atoms are in Water (H2O)? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 16. The mineral containing both magnesium and calcium is A) Calcite. B) Dolomite. C) Carnallite. D) Magnesite. Show Answer Correct Answer: B) Dolomite. 17. PH of blood is? A) 5. B) 6.2. C) 7.4. D) 8.6. Show Answer Correct Answer: C) 7.4. 18. What is the name of group 17? A) Alkali metals. B) Alkaline earth metals. C) Halogens. D) Noble gases. Show Answer Correct Answer: C) Halogens. 19. If sugar is added in a water, what happen to the boiling poingt? A) Remain the same. B) Decreases. C) Increases. D) None of above. Show Answer Correct Answer: C) Increases. 20. What is the pure chemical substance that contain one kind of atom only? A) Minerals. B) Elements. C) Rocks. D) Atom. Show Answer Correct Answer: B) Elements. ← PreviousNext →Related 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