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Question

The correct statement(s) about NH3 and PH3 is/are:

A
μD of PH3<μD of NH3
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B
PH3 is stronger Lewis base than NH3
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C
HNH>HPH
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D
both have sp3 hybridization
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Solution

The correct options are
A μD of PH3<μD of NH3
C HNH>HPH
Following are true for NH3.
Hybridization of N is sp3. Bond angle H^NH is less than 109. Lone pair exists in hybrid orbitals.
Following are true for PH3,
P follows hybridization according to Drago's rule.
HPH is close to 90. Dipole moment of pure orbital is zero. Also, NH3 is stronger Lewis base than PH3.
Thus, the statements A and C are correct and the statements B and D are correct.

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