Mention with reason the colour changes observed when :
(i) silver chloride is exposed to sunlight.
(ii) copper powder is strongly heated in the presence of oxygen.
(iii) a piece of zinc is dropped in copper sulphate solution.
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Question 16: Mention with reason the colour changes observed when:
(a) Silver chloride is exposed to sunlight.
Answer: Photo decomposition of silver chloride takes place which results in formation of silver and colour changing to grey
(b) Copper powder is strongly heated in the presence of oxygen.
Answer: Copper undergoes oxidation and black coloured copper oxide is formed.
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