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Q.

Which of the following is not true about H2O molecule?

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a

The molecule has a bent shape

b

The molecule has μ = 0

c

Shows abnormally high boiling point in comparison to the hydrides of other elements of oxygen group

d

The molecule can act as a base

answer is A.

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Detailed Solution

  • The dipole moment of water is 1.85D.
  • The dipole moment arises because, oxygen is more electronegative than hydrogen; the oxygen pulls in the shared electrons and increases the electron density around itself.
  • This creates an electric dipole moment vector, with the partial negative charge on the oxygen atom.
  • There are two O−H bonds, so the dipole moment of the molecule is the resultant vertical vector projection of the individual diagonal dipole vectors.
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Which of the following is not true about H2O molecule?