Question

a metal salt mx when exposed to light spilts up to form metal m and gas x metal m is used to make ornaments whereas gas x Is used in making bleaching powder the salt mx is used in black and white photography​

Answer 1

The compound is silver chloride.
Chlorine (gas), used as bleaching agent (plus bcuz of its action on litmus paper) therefore chlorine= gas x
Metal m is silver which is used to make ornaments.