The correct statement/s about Hydrogen bonding is/are : A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom. B. Intermolecular H bonding is present in o-nitro phenol C. Intramolecular H bonding is present in HF . D. The magnitude of H bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds. Choose the correct answer from the options given below :
(A)A only
(B)A, D, E only✓ Correct
(C)A, B, D only
(D)A, B, C only
Answer: (B)
Solution
A. Correct — hydrogen bonding requires H covalently bonded to a small, highly electronegative atom (F, O, N). B. Incorrect — o-nitrophenol shows *intra*molecular hydrogen bonding (the ortho –OH and –NO2 groups H-bond within the same molecule, forming a chelate ring), not intermolecular. C. Incorrect — HF shows *inter*molecular hydrogen bonding, forming (HF)n chains, not intramolecular. D. Correct — the extent/strength of hydrogen bonding is generally greater in the solid state than in the liquid state, so it does depend on physical state. E. Correct — hydrogen bonding strongly affects melting point, boiling point, density, viscosity etc. Correct statements: A, D, E only.
JEE Main · 2024 · 04 Apr 2024 · Shift 2 · Single correct option
