Assertion :Hydrogen chloride is a polar substance. Reason: Hydrogen and chlorine has the same electronegativity.

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 C Assertion is correct but Reason is incorrect
$H C l$ is a polar substance.

Cl atom is much more electronegative than H atom.This means that the Cl atom has a stronger pull on the electrons shared in the covalent bond than H.
This means that electrons are more towards Cl than towards H.This gives the Cl slightly negative charge and H slightly positive charge. Hence, the bond is polar and there is a large difference in electronegativity.

Hence the correct option is C.

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