Chemistry Quiz 25 (20 MCQs)

Quiz Instructions

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1. The energy stored in chemical bonds is

Correct Answer: A) Chemical energy.

2. The metallurgical process in which a metal is obtained in a fused state is called?

Correct Answer: B) Smelting.

3. Which subatomic particles are found in the nucleus?

Correct Answer: C) Protons and Neutrons.

4. Which type of reaction is:3 Pb + 2 H3PO4 $\rightarrow$ 3 H2 + Pb3(PO4)2

Correct Answer: B) Single Displacement.

5. Which of the following is Not an element?

Correct Answer: B) Water.

6. Which of these make up 96% of the elements within the human body?

Correct Answer: A) Oxygen, carbon, hydrogen and nitrogen.

7. The function of carbohydrates is

Correct Answer: D) Main source of energy.

8. Which statement about noble gases is correct

Correct Answer: B) Exist as single atoms rather than molecules.

9. Which property depends on the the amount of matter present?

Correct Answer: A) Extensive.

10. A chemical change is different than a physical change because in chemical change?

Correct Answer: C) A new substance is formed and in physical change no new substance is formed.

11. Which blood cells fight?

Correct Answer: D) White.

12. Which of the following gas is used in cigarette lighters?

Correct Answer: B) Butane.

13. Which of the following is the strongest base?

Correct Answer: D) 14.

14. How many molecules are in 2.10 mol CO?

Correct Answer: D) 1.26 X 1024 molecules.

15. Which of the following is an empirical formula?

Correct Answer: B) C3H8O.

16. What charge do electrons have?

Correct Answer: C) Negative.

17. The two groups of substances are

Correct Answer: A) Elements and compounds.

18. What are the main elements found in all living things?

Correct Answer: C) CHONPS.

19. What charge do neutrons have?

Correct Answer: B) Neutral.

20. What are the parts of an atom that carry a charge?

Correct Answer: C) Protons and Electrons.