Consider the following molecules and statements related to them:
(a) (B) is more likely to be crystalline (b) (B) has higher boiling point than (A) (c) (B) dissolves more readily than (A) in water
Identify the correct option from below:AB
(A)(a) and (c) are true
(B)(b) and (c) are true
(C)(a) and (b) are true✓ Correct
(D)only (a) is true
Answer: (C)
Solution
Molecule (A) is the ortho isomer, which can close an intramolecular hydrogen bond, while (B) is the para isomer, which can only hydrogen bond between separate molecules. That intermolecular bonding in (B) packs it into a more ordered solid, so (B) is the more likely to be crystalline and statement (a) holds. The same intermolecular bonding raises its boiling point above that of (A), so statement (b) holds. Statement (c) claims (B) dissolves in water more readily than (A); this does not hold, so (c) is false. The true statements are (a) and (b).
JEE Main · 2020 · 03 Sep 2020 · Shift 2 · Single correct option
