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Question

Give one example of a decomposition reaction which is carried out :

(a) with electricity

(b) by applying heat

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Solution

Electrolysis – In this reaction a substance is decomposed in to its constituents by use of electricity.Example:

2 N a C l rightwards arrow with E l e c t r i c i t y on top 2 N a plus C l subscript 2

Thermal decomposition- In this reaction a single substance breaks into two or more simple substances when heated. Example:

C a C O subscript 3 space left parenthesis s right parenthesis end subscript rightwards arrow with H e a t on top C a O subscript left parenthesis s right parenthesis end subscript plus C O subscript 2 space left parenthesis g right parenthesis end subscript


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