Question

A	Zn(s)+H2SO4ZnSO4(aq)+H2(g)	(i)	Photochemical decomposition
B	2AgCl(s) 2Ag(s)+Cl2(g)	(ii)	Thermal decomposition
C	2KCl 2K+Cl2	(iii)	Displacement reaction
D	2HgO(s) 2Hg+O2	(iv)	Electrolytic decomposition

• A. A-(ii), B-(iv), C-(iii), D-(i)
• B. A-(iii), B-(i), C-(iv), D-(ii)
• C. A-(iv), B-(ii), C-(i), D-(iii)
• D. A-(ii), B-(iv), C-(iii), D-(i)

Answer 1

The correct option is B A-(iii), B-(i), C-(iv), D-(ii)

Zinc displaces hydrogen from sulphuric acid. Therefore, it is a displacement reaction.​

Silver chloride decomposes in the presence of sunlight to give silver and chlorine. This is a photochemical decomposition. ​

Potassium chloride decomposes to potassium and chlorine in the presence of electricity. Hence, it is an electrochemical decomposition.​

Mercuric oxide undergo thermal decomposition to give mercury and oxygen.​

Therefore, the match the following can be completed as,