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Which of the following are exothermic pr...

Which of the following are exothermic processes?
1. Reaction of water with quick lime
2. Dilution of an acid
3. Evaporation of water
4. Sublimation of camphor (crystals)

A

I and II

B

II and III

C

I and IV

D

III and IV

Text Solution

Verified by Experts

The correct Answer is:
A
`underset("Quick lime")(CaO)+H_(2)OtoCa(OH)_(2)+"heat"`
Also, dilution of concentrated acids is highly exothermic reaction. The heat produced is so large that the solution may splash out, hence it is always done by taking sufficient amount of water and adding concentrated acid into it slowly with stirring. Evaporation and sublimation are endothermic processes as heat is used up in these processes.
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