Question

A metal salt MX when exposed to light splits up to form metal M and
gas X2 . Metal M is used to make ornaments whereas gas X, is used
in making bleaching powder. The salt MX is used in black & white
photography.
(a) Identify the metal M and gas X,
(b) Identify MX.
(c) Write down the chemical reaction when salt MX is exposed to
sunlight.​

Answer 1

A) Metal A is Silver (Ag), Gas X2 is Chlorine

B) Metal MX is AgCl

C) By decomposition reaction:

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