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Assertion: The second ionisation energie...

Assertion: The second ionisation energies of V, Cr and Mn are in the order `VltCrltMn`.
Reason: Ionisation energies show a regular increase along a period with increase of atomic number.

A

If both (A) and (R) are correct and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect.

D

If (A) is incorrect but (R) is correct.

Text Solution

Verified by Experts

The correct Answer is:
d
Correct A: The correct order of `IE_(2)` is
`V lt Cr lt Mn`
Correct `R: Cr` after losing one electron has `3d^5` stable configuration from which removal of second electron is difficult.
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Knowledge Check

  • The second ionisation energy of the following elements follows the order

    A
    `Zn gt Cd lt Hg`
    B
    `Zn gt Cd gt Hg`
    C
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    D
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  • Ionisation energy increases in the order :

    A
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    B
    `B le Be lt C lt N`
    C
    `C lt N lt Be lt B`
    D
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