a metal salt mx when exposed to light splits up to form metal m and a gas x2. metal m is used in making ornaments whereas X2 gas i

a metal salt mx when exposed to light splits up to form metal m and a gas x2. metal m is used in making ornaments whereas X2 gas is used in making bleaching powder. the salt MX itself used in black and white photography. identify the metal X and name the process involved in it. mention the type of chemical reaction involved when salt MX is exposed in light.​

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