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Question

Which of the following reactions are exothermic in nature?


A
Evaporation of water
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B
Dissolution of sodium hydroxide in water
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C
Dilution of sulphuric acid
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D
Combustion of methane gas
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Solution

The correct options are
B Dissolution of sodium hydroxide in water
C Dilution of sulphuric acid
D Combustion of methane gas

Dissolution of sodium hydroxide in water, dilution of sulphuric acid and combustion of methane gas are exothermic reactions in which a large amount of heat is released.

Evaporation of water is endothermic reaction in which heat is absorbed.


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