Question

Acidity increases in the order

• A. H-F > H-Cl > H-Br > H-I
• B. H-F < H-Cl < H-Br < H-I
• C. H-F > H-Cl < H-Br > H-I
• D. H-F > H-Cl > H-Br < H-I

Answer 1

The correct option is B H-F < H-Cl < H-Br < H-I

Because of increased size and decrease in bond dissociation enthalpy acidity of hydrogen halides decreases from fluoride to iodide. Thus the acidity increases in the order H-F < H-Cl < H-Br < H-I