AP EAMCET202318 May 2023Evening ShiftChemistryHydrogenActual
Arrange the hydrides NH ₃, HF , H ₂ O , HCl in the increasing order of their boiling points
Options
- AHF < NH ₃ < HCl < H ₂ O
- BH ₂ O < HF < HCl < NH ₃
- CNH ₃ < HCl < H ₂ O < HF
- DHCl < NH ₃ < HF < H ₂ O
Correct answer
D. HCl < NH ₃ < HF < H ₂ O
Step-by-step solution
(d H ₂ O , HF and NH ₃ have hydrogen bonding as the intermolecular forces while HCl has weaker dipoledipole interaction. Thus, HCl has the lowest boiling point. Among H ₂ O , HF, and NH ₃ H ₂ O has the highest boiling point due to extensive network of hydrogen bonds. Among NH ₃ and HF , HF forms stronger hydrogen bonds due to very high electronegativity of fluorine. Thus, the order of boiling point will be :- HCl < NH ₃ < HF < H ₂ O