Question

3. Assertion(A): White silver chloride turns grey in sunlight. Reason (R): Decomposition of silver chloride in presence of sunlight takes place to form silver metal and chlorine gas. 0 b. 0 d. O a. C.​

Answer 1

Answer:

Yes

both assertion and reason is true and reason is correct explaination of assertion

Sunlight carries a good amount of energy, which makes silver chloride (AgCl) decompose in silver (Ag) and chlorine. The metallic silver appears as very small 'flakes', essentially black, so these tiny black spots evenly distributed in the mass of white silver chloride makes it look grey.

Answer 2

Both Assertion and the reason are true and the reason is the correct explanation of the assertion.

Explanation  

DECOMPOSITION OF SILVER CHLORIDE -  

• The reaction in which a reactant breaks into two or more products is known as a decomposition reaction.
• The reaction can be both exothermic or endothermic in nature.
• When silver chloride is kept in sunlight it decomposes to form silver metal.
• The reaction involves the evolution of chlorine gas.
• The color of the metal changes from white to grey due to the formation of silver metal.
• The reaction involved is -

                              $2AgCl_2$↑ → $Ag + Cl_2$