Molecules with a permanent dipole moment include which of the following?

(P) HCN

(Q) O3

(R) XeF2

  1. A

    P only

  2. B

    P and Q only

  3. C

    Q and R only

  4. D

    P, Q and R

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    Solution:

    HCN is a polar, linear-shaped molecule having one link between the H and N atoms and one C atom in the middle. There is a constant dipole moment in this chemical connection. Due to the presence of N in HCN, which is not physically linked to hydrogen atoms, dipole-dipole forces are present between the HCN molecule's electron pair.

    A resonance structure is created when a single and a double bond between the centre oxygen and the flanking oxygens swap locations. While the other oxygens share a negative charge between them, the centre oxygen has a single formal + charge. Ozone O3 therefore has a constant dipole moment.

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