BPSC – Combined Competitive Examination · પ્રશ્ન 108
Which of the following are exothermic processes? i. Evaporation of water ii. Dilution of an acid (H₂SO₄) iii. Reaction of water with quicklime iv. Sublimation of camphor
જવાબ બતાવો અને સમજૂતી
જવાબ: (B) ii and iii
સમજૂતી
Evaporation and sublimation absorb heat; diluting H₂SO₄ and CaO + H₂O release heat.
- (A) ખોટો
Wrong: sublimation absorbs heat.
- (B) સાચો
Correct: diluting acid and slaking lime both release heat.
- (C) ખોટો
Wrong: both are endothermic.
- (D) ખોટો
Wrong: evaporation is endothermic.