A metal salt mx when exposed to light split up to form metal metal M and gas X₂. metal m is used to make ornaments whereas gas X₂ is used to make ornaments whereas gas X₂ is used in making bleaching Powder. The salt MX is used in black & white photography. (a) Identify the metal M and Gas X₂. (b) Identify MX. (c) Write down the chemical reaction when salt MX is exposed to sunlight.