Question

Assertion (A) : Sodium metal is stored under kerosene.

Reason (R) : Metallic sodium metals when exposed to air.

(a) Both (A) and (R) are true and (R) is the correct explanation of (A).

(b) Both (A) and (R) are true but (R) is not a correct explanation of (A).

(c) (A) is true but (R) is false.

(d) (A) is false but (R) is true.

Answer 1

(c) (A) is true but (R) is false.

Sodium is kept in kerosene to prevent it from oxygen present in the air. If this happens, it will react with the oxygen and form sodium oxide. This is a strongly exothermic reaction and a lot of heat is generated. Thus, sodium is kept under kerosene.