BPSC – Combined Competitive Examination · வினா 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
விடையைக் காட்டு & விளக்கம்
விடை: (B) ii and iii
விளக்கம்
Evaporation and sublimation absorb heat; diluting H₂SO₄ and CaO + H₂O release heat.
- (A) தவறு
Wrong: sublimation absorbs heat.
- (B) சரி
Correct: diluting acid and slaking lime both release heat.
- (C) தவறு
Wrong: both are endothermic.
- (D) தவறு
Wrong: evaporation is endothermic.