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Solution


Q.

The number of endothermic process/es from the following is _________ .

A.  I2(g)→2I(g)

B.  HCl(g)→H(g)+Cl(g)

C.  H2O(l)→H2O(g)

D.  C(s)+O2(g)→CO2(g)

E.  Dissolution of ammonium chloride in water                       [2023]

Ans.

(4)

A → Atomisation (Endothermic)

B → Atomisation (Endothermic)

C → Vapourisation (Endothermic)

D → Combustion (Exothermic)

E → Dissolution (Endothermic)