JEE Main · 2023 · 24 Jan 2023 · Shift 1 · Chemical Bonding and Molecular Structure

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Decreasing order of the hydrogen bonding in following forms of water is correctly represented by
A. Liquid water
B. Ice
C. Impure water

(A) $A = B > C$
(B) $B > A > C$ ✓ Correct
(C) $C > B > A$
(D) $A > B > C$

Answer: (B)

Solution

In ice each water molecule is locked into a tetrahedral framework in which it both donates and accepts four hydrogen bonds, so the extent of hydrogen bonding is greatest there. In liquid water thermal motion ruptures a fraction of these bonds, leaving fewer per molecule, and dissolved impurities disrupt the network still further. The decreasing order of hydrogen bonding is ice, then liquid water, then impure water.

JEE Main · 2023 · 24 Jan 2023 · Shift 1 · Single correct option

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