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For d block elements the first ionizatio...

For d block elements the first ionization potential is of the order

A

`Zn gt Fe gt Cu gt Cr`

B

`Sc = Ti lt V= Cr`

C

`Zn gt Cu gt lt Ni lt Co`

D

`V gt Cr gt Mn gt Fe`

Text Solution

Verified by Experts

The correct Answer is:
A
The ionisation energies increases with increase in atomic number. However, the trend is irregular among some d - block elements. On the basis of electronic configuration, the
Zn : ` 1 s ^ 2 2 s^ 2 p ^ 6 d ^ ( 10 ) 4 s ^ 2 `
` Fe : 1 s ^ 2 2 s ^ 2 p ^ 6 3 s ^ 2 p ^ 6 d ^ 6 4s ^ 2 `
Cu : ` 1 s ^ 2 2 s ^ 2 p ^ 6 d ^ ( 10 ) 4 s ^ 1 `
Cr : ` 1 s ^ 2 2 s ^ 2 p ^ 6 3 s ^ 2 p ^ 6 d ^ 5 4 s ^ 1 `
` IE _ 1 ` follows the order: ` Zn gt Fe gt Cu gt Cr `
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