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Standard X

Chemistry

Mole Concept

Assertion :Di...

Question

Assertion :Dipole moment of $C - C l$ bond is more than that of $C - F$ . Reason: Size of $F$ is very small.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Dipole moment, μ is the product of the magnitude of charge accumulated on bond and the distance between the two poles. Thus dipole moments of alkyl halide depend on not only the polarity of the bond but also on the bond length. The greater value of dipole moment for $C - C l$ in comparison of $C - F$ is due to a cumulative result of polarity and longer bond length of $C - C l$ compared to $C - F .$

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Assertion :Dipole moment of C−Cl bond is more than that of C−F. Reason: Size of F is very small.

Assertion :Dipole moment of $C - C l$ bond is more than that of $C - F$ . Reason: Size of $F$ is very small.