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Question

Identify correct order of average molecular dipole moment.
  1. All are incorrect.
  2. PCl3F2>N2O4(g)>N2O4(s)
  3. PCl3F2<N2O4(g)=N2O4(s)
  4. PCl3F2<N2O4(g)<N2O4(s)

A
All are incorrect.
B
PCl3F2>N2O4(g)>N2O4(s)
C
PCl3F2<N2O4(g)<N2O4(s)
D
PCl3F2<N2O4(g)=N2O4(s)
Solution
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Correct Option D
Reason:- PCl3F2 has a symmetrical & thus has a zero dipole moment. Increasing dipole moments N from N2O4(s) to N2O4(g)is due to the fact that dipole moment=charge*distance.

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