Question

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

Answer 1

Correct answer is 4

A → Endothermic (Atomisation) 

B → Endothermic (Atomisation) 

C → Endothermic (Vapourisation) 

D → Exothermic (Combustion) 

E → Endothermic (Dissolution)