Q7 of 41 Page 1

Write the uses of decomposition reactions.

The decomposition reactions carried out by electricity are used to extract several metals from their naturally occurring compounds like chlorides and oxides. When passing electricity decomposes the fused metal chloride or metal oxide, then metal is produced at the cathode.

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5 Give balanced equations, wherever possible, or where this is not possible, explain the following by means of examples:
(i) A reaction which gives out heat.
(ii) A reaction which takes place with the help of sunlight.
(iii) A reaction which is brought about by electric current.
(iv) Reversible Reactions.
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