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QJEEAdv14Cha388: JEE Advanced 2014 Chemistry - Class 11 JEEAdv14Cha388 Solution: Hydrogen bonding plays a central role in the following phenomena

Hydrogen bonding plays a central role in the following phenomena

Multiple Choice Options

  • A ice floats in water
  • B higher Lewis basicity of primary amines than tertiary amines in aqueous solutions
  • C formic acid is more acidic than acetic acid
  • D dimerisation of acetic acid in benzene

Step-by-Step Verified Solution

(a) Ice floats in water due to the low density of ice as compare to water which is due to open cage like structure (formed by intermolecular H-bonding).

(b) Basic strength of RNH2 > R3N. It is also explained by hydrogen bonding.
JEE Advanced 2014 Paper 1 Offline Chemistry - Chemical Bonding & Molecular Structure Question 9 English Explanation 1

(c) JEE Advanced 2014 Paper 1 Offline Chemistry - Chemical Bonding & Molecular Structure Question 9 English Explanation 2
(d) Dimerisation of acetic acid in benzene is due to intermolecular hydrogen bonding.
JEE Advanced 2014 Paper 1 Offline Chemistry - Chemical Bonding & Molecular Structure Question 9 English Explanation 3

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