Question

1. Which among the following statement(s) is (are) true?
Exposure of silver chloride to sunlight for a long duration turns grey due to:
(i) The formation of silver by decomposition of silver chloride.
(i) Sublimation of silver chloride.
(iii) Decomposition of chlorine gas from silver chloride.
(iv) Oxidation of silver chloride.
(a) (i) only
(b) (i) and (iii)
(c) (i) and (iii)
(d) (iv) only
​

Answer 1

Answer:

option a ............

Answer 2

Correct statement is - (a) (i) only

On exposure of sunlight, silver chloride turns grey. This happens due to the decomposition reaction occurring on the molecule.

The molecule breaks into silver particles and chlorine gas. Silver chloride is white in colour while silver powder is grey in colour.

Hence, grey colour is observed on the exposure of sunlight.

Reaction for decomposition us written below -

2AgCl(s) --> 2Ag(s) + Cl2 (g)

Ag represents silver, Cl2 represents chlorine gas and AgCl represents silver chloride.