Regarding dipole-dipole attractions the incorrect statement is:
A
dipole-dipole attractions are more, if the molecules have height dipole moment values.
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B
in liquid HBr dipole-dipole attractions are present
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C
dipole-dipole interaction energy between stationary polar molecules as in solids ∝r−3
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D
dipole-dipole interaction energy between rotating molecules ∝r6
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Solution
The correct options are A dipole-dipole attractions are more, if the molecules have height dipole moment values. C dipole-dipole interaction energy between rotating molecules ∝r6 The correct option are A and D. The correction of statement A is Dipole-dipole attraction are more if the charge of separation in a molecule is large. Larger the difference in electronegativities of bonded atoms, the larger will be the dipole moment.
The correction of statement D is dipole-dipole interaction energy between rotating molecules is ∝1r6.