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Assertion: Superoxide ion is paramagneti...

Assertion: Superoxide ion is paramagnetic whereas peroxide ion is diamagnetic.
Reason: Superoxide ion `[O=O]^(-)` has one unpaired electron whereas peroxide ion `[O=O]^(-)` has no unpaired electron.

A

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

B

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

C

If asseration is true but reason is false.

D

If asseration is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
`[O=O]^(-)` has `MO` configuration
`sigma1s^(2)sigma**,sigma2s^(2)**2s^(2),sigma2p^(2)pi2p_(x)^(2)pi2p_(y)^(2)pi**2p_(y)^(2)pi**2p_(x)^(2)pi**2p_(y)^(1)`
`[O=O]^(2-)` has `MO` configuration
`sigma1s^(2)**1s^(2),sigma2s^(2)sigma**2s^(2),sigma2p^(2)pi2p_(x)^(2)pi2p_(y)^(2)pi**2p_(x)^(2)pi**2p_(y)^(2)`
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Knowledge Check

  • Assertion : Superoxides of alkali metals are paramagnetic. Reason : Superoxides contain the ion O_(2)^(-) which has one unpaired electron.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
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    C
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  • Assertion(A) - Magnetic moment of super oxide ion is much larger than that of peroxide ion. Reason( R )-Peroxide ion has no unpaired electrons but superoxide ion has unpaired electrons.

    A
    Both A and R true and R is the correct explanation of A
    B
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    C
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    D
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  • Assertion : Supeoxides of alkali matels are paramagnetic. Reason : Superoxides conatain the ion O_(2)^(-) which has one unpaired electron in its anti-bonding molecule orbital.

    A
    If assertion is true but the reason is false
    B
    If assertion is false but reason is true
    C
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    D
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