Question

Assertion : The dipole moment helps to predict whether a molecule is polar or non- polar.
Reason : The dipole moment helps to predict geometry of molecule.
A. (a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. (b)If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. (c )If assertion is true but reason is false.
D. (d)If assertion is false but reason is true.

Answer 1

Correct Answer - A
The linear triatomic molecules of the type `B-A-B e.g. CO_(2)` have no dipole moment, not because the individual `C=O` bonds are non-polar but because the two bond moment (polarity) cancle each other. Therefore, geometry of molecules can be predicted by the other. Therefore, geometry of molecules can be predicted by the value of dipole moment.