10. Give one example of a decomposition reaction which is carried out :
(a) with electricity
(b) by applying heat
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Answer:
When lead nitrate is heated strongly, it breaks down to form lead monoxide, nitrogen dioxide and oxygen.
When fused sodium chloride is decomposed by passing electricity, sodium metal is obtained.
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Answer:
The decomposition of water into hydrogen and oxygen in the presence of electricity is an example of decomposition reaction carried out with the help of electricity.
(a) When electricity is passed through acidified water it decomposes to hydrogen gas and oxygen gas. (b) By applying heat, thermal decomposition takes place. The heating of baking soda is an example of thermal decomposition.
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