Question

Which of the following are exothermic processes?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)


Answer it with explanation​

Answer 1

Answer:

(A) (i) and (ii)

When water reacts with quick lime, calcium hydroxide is formed along with release of heat. Thus, it is an exothermic reaction. The process of diluting a concentrated acid is a highly exothermic process. Evaporation of water and sublimation of camphor are examples of endothermic reactions.

Explanation:

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Answer 2

Answer:

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A) Reaction of water with quick lime

Explanation :-

Reason: In both the cases, heat energy is evolved.