Question

A metal Salt MX used in black and white photography when exposed to sunlight, splits into metal M
and gas X2 . Which one is the correct chemical equation for above reaction-

Answer 1

Answer:

Well specifically two salts which are used in black and white photography i.e AgCl and AgBr i.e Silver Chloride and Silver bromide.

Explanation:

When a sample of silver chloride is exposed to sunlight it decompses photolytically to form silver and chlorine samples seperately

Equation : 2AgCl → 2Ag + Cl2

Hope you might have got it and the above experiment or equation is thermal decomposition reaction example