Answers

Here are the answers to the 20 MCQs from Metals and Non-Metals for Class 10 CBSE Board:

1. Which of the following is a metal?

Ans: c) Sodium

2. The property of metals by which they can be drawn into thin wires is called:

Ans: a) Ductility

3. Which of the following non-metals is a good conductor of electricity?

Ans: c) Carbon (graphite)

4. Which of the following metals is the most reactive?

Ans: d) Potassium

5. Which metal is liquid at room temperature?

Ans: b) Mercury

6. Which of the following non-metals is lustrous?

Ans: a) Iodine

7. The non-metal which exists in liquid state at room temperature is:

Ans: b) Bromine

8. Which gas is produced when metals react with acids?

Ans: b) Hydrogen

9. Which metal is used in galvanization?

Ans: a) Zinc

10. The ability of metals to be beaten into thin sheets is known as:

Ans: a) Malleability

11. Which of the following metals does not react with water?

Ans: c) Copper

12. Which of the following metal is used for making aircraft bodies?

Ans: b) Aluminium

13. A metal which is stored in kerosene is:

Ans: c) Sodium

14. The most abundant metal in the Earth's crust is:

Ans: b) Aluminium

15. Which of the following metal is the best conductor of electricity?

Ans: d) Silver

16. The chemical process in which iron reacts with oxygen and moisture to form iron oxide is called:

Ans: a) Corrosion

17. Which non-metal is essential for respiration?

Ans: b) Oxygen

18. Which metal does not react with hydrochloric acid?

Ans: c) Copper

19. Which non-metal is used in the manufacture of fertilizers?

Ans: a) Nitrogen

20. What is formed when a metal reacts with oxygen?

Ans: c) Metal oxide

Let me know if you need further clarifications!