Question

Match the following:-

	List I		List II
I.	Iron	A.	Liquid at room temperature
II.	Copper	B.	Deposition of reddish -brown layer on exposure to moist air
III.	Potassium	C.	Can be cut easily with a knife
IV.	Mercury	D.	Formation of a greenish layer on exposure to moist air

• A. I - A, II - C, III - D, IV - B
• B. I - B, II - D, III - C, IV - A
• C. I - C, II - A, III - B, IV - D
• D. I - D, II - B, III - A, IV - C

Answer 1

The correct option is B I - B, II - D, III - C, IV - A

1. Iron gets corroded when exposed to moist air i.e there is a deposition of reddish brown layer.
2. Copper reacts with moist air and gets oxidized to form a greenish layer.
3. Potassium is a soft metal. It is a silvery white metal. It can be easily cut with knife.
4. Mercury is the only metal that is found in the liquid state at room temperature.