Question:
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)
Solution:
(d). Both sublimation of dry ice (ii) and evaporation of water (iv) are of endothermic nature.