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Assertion : H(2) molecule is more stable...

Assertion `: H_(2)` molecule is more stable than `He-H ` molecule .
Reason `:` The antibonding electron in `He-H` molecule decreases the bond order thereby the stability.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
a
Bond order for `H_(2)=1`
Bond order for `He-H=(1)/(2)`.
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Knowledge Check

  • Assertion . H_(2) molecule is more stable than HeH molecule. Reason . The antibonding elelctron in the molecule destabilises is .

    A
    If both assertion and reason are correct, and reason is the correct explanation of the assertion.
    B
    If both assertion and reason are correct , but reason is not the correct explanation of the assertion.
    C
    If assertion is correct, but reason is incorrect .
    D
    If both assertion and reason are incorrect.

  • Assertion: H_(2) molecule is more stable than HEH molecule. Reason: the anti-bonding electron in the molecule destabilise it.

    A
    If both assertion and Reason are true and the Reason is the correct explanation of the assertion.
    B
    If both assertion and Reason are true but the reason is not the correct explanation of the assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.

  • Assertion(A) - H_2 molecule is stabler than HCH molecule. Reason(R ) :The antibonding electron in the molecules stabilises it.

    A
    Both A and R true and R is the correct explanation of A
    B
    Both A and R true and R is not a correct explanation of A
    C
    A is true but R is false
    D
    A is false but R is true