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Solution


Q.

Which of the following reactions is an endothermic reaction
1 Burning of coal.
 
2 Decomposition of vegetable matter into compost.
 
3 Process of respiration.
 
4 Decomposition of calcium carbonate to form quick lime and carbon dioxide.
 

Ans.

(2) 

Decomposition of calcium carbonate to form quick lime and carbon dioxide is an endothermic reaction since this process absorbs heat from atmosphere.