Chemistry Quiz 52 (20 MCQs)

Quiz Instructions

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1. How many electrons can occupy the first main energy level of an atom?

Correct Answer: A) 2.

2. A neutral solution has a pH of

Correct Answer: C) 7.

3. Enzymes bring about their effect on the rate of reaction by

Correct Answer: C) Lowering the activation energy.

4. The dissolving materials in solution

Correct Answer: C) Solvent.

5. What type of particle is:KCl

Correct Answer: C) Formula Unit.

6. Which of the following is ONE of the signs of a chemical reaction?

Correct Answer: A) Gas production.

7. A type of matter in which the electrons have been completely or partially separated from the atoms is a

Correct Answer: D) Plasma.

8. Which noble gas has the highest boiling point?

Correct Answer: B) He.

9. It is the made of particles that give its mass and volume

Correct Answer: A) Matter.

10. What is the common name for H2O?

Correct Answer: D) Water.

11. Which of the following will have a larger radius than Zinc?

Correct Answer: D) Strontium.

12. Which metal is heaviest?

Correct Answer: C) Osmium.

13. Element

Correct Answer: D) A material that cannot be split into simpler materials; each element is made of only one kind of atom.

14. The main chemical constituent of clay is?

Correct Answer: C) Aluminium silicate.

15. Moving to the right on the periodic table increases the .....

Correct Answer: C) Valence electrons.

16. The graphite rods in the nuclear reactor

Correct Answer: C) Convert fast moving neutrons into thermal neutrons.

17. Which of these recorded observations is qualitative, rather than quantitative?

Correct Answer: D) Iron is denser than aluminum.

18. The substance that contains the maximum amount of nitrogen is?

Correct Answer: A) Urea.

19. The metal that is used as a catalyst in the hydrogenation of oils is?

Correct Answer: A) Ni.

20. Which of the following is NOT an example of chemical change?

Correct Answer: C) Sharpening a pencil.