1.

Give reasons : (a) white silver chloride turns grey in sunlight. (b) brown coloured copper powder on heating in air turns into black coloured substance.

Answer»

Hey!!!

(a) White Silver Chloride (AgCl) turns GREY in sunlight because of Photolysis or Photolytic decomposition in the presence of sunlight.
=> Silver Chloride decomposes to form Silver and Chloride.

(B) Brown coloured copper powder on heating in AIR turns into a black substance, this black substance is copper oxide. This is an EXAMPLE of combination reaction. Copper and oxygen react to form a single product called copper oxide.

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