| (i) Evaporation of water |
| (ii) Dissolution of sodium hydroxide in water |
| (iii) Dilution of sulphuric acid |
| (iv) Dissolution of ammonium chloride in water |
| (v) Combustion of methane gas |
A) (i), (iv) and (v) only
B) (ii), (iii) and (v) only
C) (i), (ii) and (iv) only
D) (i), (iii) and (iv) only
Correct Answer: D
Solution :
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 and dissolution of ammonium chloride in water are endothermic reactions in which heat is absorbed.
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