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The correct order of the second ionisati...

The correct order of the second ionisation potential of carbon, nitrogen, oxygen and fluorine is

A

`Cgt N gtO gtF`

B

`O gt N gt F gtC`

C

`O gt F gt N gt C`

D

`F gt O gt N gt C`

Text Solution

Verified by Experts

The correct Answer is:
C
The order is `O gt F gt N gt C`
From left to right, the first ionisation potential increases.
`O^(o+) rarr 1s^(2) 2s^(2) 2p^(3)`
After losing one electron. Oxygen atom acquires half-filled stable configuration, so its second ionisation potential becomes larger than the that for fluorine.
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Knowledge Check

  • the correct order of second ionisation potential of carbon ,nitrogen,oxygen and fluorine is

    A
    `CgtNgtOgtF`
    B
    `OgtNgtFgtC`
    C
    `OgtFgtNgtC`
    D
    `FgtOgtNgtC`

  • The correct order of 2^(nd) ionisation potential of carbon, nitrogen, oxygen and fluorine is

    A
    `C gt N gt O F`
    B
    `O gt N gt F gt C`
    C
    `O gt F gt N gt C`
    D
    `F gt O gt N gt C`

  • The second ionisation potential is

    A
    Less than the first ionisation potential
    B
    Equal to the first ionisation potential
    C
    Greater than the first ionsation potential
    D
    None of these

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