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  • Which of the following is(are) an endothermic process(es)? (i) Dilution of sulphuric acid

Which of the following is(are) an endothermic process(es)?

(i) Dilution of sulphuric acid

(ii) Sublimation of dry ice

(iii) Condensation of water vapours

(iv) Evaporation of water

(a) (i) and (iii)       (b) (ii) only

(c) (iii) only           (d) (ii) and (iv)

Answers (1)

Ans. (d)

Dilution of sulphuric acid with water is a highly exothermic process as it occurs with the evolution of heat.

Sublimation of ice is a direct phase transition from solid to gas

Condensation is the change of water from its gaseous form (water vapor) into liquid water.

Evaporation is the process by which water changes from a liquid to a gas or vapor.

Change of solid to gas or liquid to gas absorbs heat hence it is an endothermic reaction.

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