Question

A metal salt MX when exposed to light split up to from metal M and gas X2 metal M use in making oranment where as gas X2 is used in making bleaching powder . The salt MX is itself used in black and white photography.
1. Identity metal M and gas X2.
2. Mention the type of chemical reaction involved when salt MX is exposed to light.

Answer 1

Answer:

1. M is Ag(silver) and the gas is chlorine gas(cl)

2. The above reaction is called photolysis reaction or decomposition reaction.

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Answer 2

here, salt m is silver and x2 is chlorine gas

it splits in the form of silver and chloride due to the presence of sunlight

agcl breaks down into silver and chloride as it's a decomposition reaction