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