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

(ii) 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) (ii) and (iii) 

(D) (iv) only

 

Answer

 

The reaction is as follows:

Exposure of Silver Chloride to Sunlight - Teachoo-01.jpg

In the presence of sunlight , AgCl decomposes to give grey colored Ag.

 

Also,

  • Sublimation means turning of solid to Gas. Here, Silver does not turn into gas. So, this this not sublimation
  • Decomposition means that single reactant converts into multiple products. Here AgCl is decomposed, not Chlorine gas.
  • Oxidation means Oxygen is added to Silver (Ag), but that is not the case in this reaction

 

So, the correct option is (a) - (i) only

  1. Class 10
  2. Chapter 1 Class 10 - Chemical Reactions and Equations (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo