This quiz works best with JavaScript enabled. Home > Science > Chemistry – Quiz 52 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 52 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which compound has the smallest molar mass? A) CO. B) CO2. C) H2O. D) H2O2. Show Answer Correct Answer: C) H2O. 2. An ..... reaction is when more energy is released than is absorbed. This energy can be in the form of light, heat, electricity, etc. A) Endothermic. B) Endergonic. C) Exothermic. D) Exergonic. Show Answer Correct Answer: D) Exergonic. 3. An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable? A) Gain 1 electron. B) Lose 2 electrons. C) Lose 8 electrons. D) Neither gain nor lose any valence electrons. Show Answer Correct Answer: D) Neither gain nor lose any valence electrons. 4. How many electrons can occupy the first main energy level of an atom? A) 2. B) 8. C) 18. D) 32. Show Answer Correct Answer: A) 2. 5. A neutral solution has a pH of A) 1. B) 4. C) 7. D) 10. Show Answer Correct Answer: C) 7. 6. Enzymes bring about their effect on the rate of reaction by A) Increasing activation energy. B) Lowering the energy of the products. C) Lowering the activation energy. D) Lowering the energy of the reactants. Show Answer Correct Answer: C) Lowering the activation energy. 7. The dissolving materials in solution A) Solution. B) Solute. C) Solvent. D) Saturated solution. Show Answer Correct Answer: C) Solvent. 8. What type of particle is:KCl A) Atom. B) Molecule. C) Formula Unit. D) Ion. Show Answer Correct Answer: C) Formula Unit. 9. Which of the following is ONE of the signs of a chemical reaction? A) Gas production. B) Water changing to water vapour. C) Ice changing to water. D) Butter melting. Show Answer Correct Answer: A) Gas production. 10. A type of matter in which the electrons have been completely or partially separated from the atoms is a A) Gas. B) Solid. C) Liquid. D) Plasma. Show Answer Correct Answer: D) Plasma. 11. Which noble gas has the highest boiling point? A) Ar. B) He. C) Kr. D) Xe. Show Answer Correct Answer: B) He. 12. It is the made of particles that give its mass and volume A) Matter. B) Phase transition. C) Physical properties. D) Chemical properties. Show Answer Correct Answer: A) Matter. 13. What is the common name for H2O? A) Salt. B) Acid. C) Base. D) Water. Show Answer Correct Answer: D) Water. 14. Which of the following will have a larger radius than Zinc? A) Gallium. B) Aluminum. C) Magnesium. D) Strontium. Show Answer Correct Answer: D) Strontium. 15. Which metal is heaviest? A) Iron. B) Nickle. C) Osmium. D) Mercury. Show Answer Correct Answer: C) Osmium. 16. Element A) The location of electrons circling the nucleus of an atom. B) The total amount of matter in something. C) A simple substance like water or cotton. D) A material that cannot be split into simpler materials; each element is made of only one kind of atom. Show Answer Correct Answer: D) A material that cannot be split into simpler materials; each element is made of only one kind of atom. 17. The main chemical constituent of clay is? A) Zeolites. B) Silicon oxide. C) Aluminium silicate. D) Aluminium borosilicate. Show Answer Correct Answer: C) Aluminium silicate. 18. Moving to the right on the periodic table increases the ..... A) Electron rings. B) More protons. C) Valence electrons. D) Periodic. Show Answer Correct Answer: C) Valence electrons. 19. The graphite rods in the nuclear reactor A) Produce neutrons. B) React with U to release energy. C) Convert fast moving neutrons into thermal neutrons. D) Undergo combustion which triggers the nuclear fission. Show Answer Correct Answer: C) Convert fast moving neutrons into thermal neutrons. 20. Which of these recorded observations is qualitative, rather than quantitative? A) A chemical reaction is complete in 2.3 s. B) The solid has a mass of 23.4 g. C) The compound melts at 87.5C. D) Iron is denser than aluminum. Show Answer Correct Answer: D) Iron is denser than aluminum. ← 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