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Question

Which of the following statements are correct for HCN molecule?

A
Two N-bonds are perpendicular to each other
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B
Lone pair lying in the orbital which is perpendicular to both N-bonds
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C
The dipole moment value is non zero
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D
The direction of dipole moment is from N to H-atom
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Solution

The correct options are
A Two N-bonds are perpendicular to each other
B Lone pair lying in the orbital which is perpendicular to both N-bonds
C The dipole moment value is non zero
The dipole moment is directed from less electronegative to more electronegative and its dipole moment is non-zero. Two π - bonds in the molecule are perpendicular to each other and also lone pair in N.
Hence options A,B & C are correct.

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