Assertion (A) : The bond energy of $H_{2}$ molecule is greater than HCl molecule.
Reason (R) : The bond energy in the overlapping between $1 s$ and $1 s$ sub shells of $H_{2}$ is greater than that of $3 p$ and sub shells of HCl.

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Both A and R are correct and R is the correct explanation of A.

A is incorrect, R is correct.

A is correct, R is incorrect.

Both A and R are correct but R is not the correct explanation of A.

answer is A.

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Detailed Solution

The bond energy of $H_{2}$ molecule is greater than HCl molecule. Due to s-orbital’s two hydrogen atoms is close to the nucleus then the bond length is low. But p-orbital of chlorine far to the nucleus then the bond length is high in HCl. So the bond energy of $H_{2}$ is greater than HCl.

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