The bond between carbon and hydrogen is one of the most important types of bonds in chemistry. the length of an h—c bond is approximately 1.1 å. based on this distance and differences in electronegativity, do you expect the dipole moment of an individual h—c bond to be larger or smaller than that of an h—i bond?

The dipole moment of H-C bond will be smaller than that of an H-I bond.

Explanation:

The electronegativity of iodine is greater than that of hydrogen.As a result the iodine atom tends to attract the bond electron pair of H-I bond towards itself creating a bond dipole which does not occur in case of H-C bond as the electronegativity of carbon and hydrogen are almost same.

   That"s why dipole moment of H-C bond is smaller than that of H-I bond.

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