Home
Class 11
CHEMISTRY
The correct order of the number of unpai...

The correct order of the number of unpaired electrons in the ions `Cu^(2+), Ni^(2+), Fe^(3+)`, and `Cr^(3+)`is

A

`Cu^(2+) gt Ni^(2+) gt Cr^(3+) gt Fe^(3+)`

B

`Cr^(3+) gt Fe^(2+) gt Ni^(2+) gt Cu^(2+)`

C

`Fe^(3+) gt Cr^(3+) gt Cu^(2+) gt Ni^(2+)`

D

`Fe^(3+) gt Cr^(3+) gt Ni^(2+) gt Cu^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Cr (Z = 24):[Ar] 3d^(5) 4s^(1) rArr Cr^(3+)is [Ar] 3d^(3)`, i.e., `3` unpaired eletrons.
`Fe (Z = 26):[Ar]3d^(6)4s^(2)rArr Fe^(3+)is [Ar] 3d^(8)`, i.e., `2` unpaired electrons.
`Cu (Z = 29):[Ar] 3d^(10)4s^(1) rArr Cu^(2+)is [Ar] 3d^(9)`, i.e., `1` unpaired electron.
Thus, the correct order is
`Fe^(3+) gt Cr^(3+) gt Ne^(2+) gt Cu^(2+)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    R SHARMA|Exercise Level-IV|4 Videos

  • STATES OF MATTER

    R SHARMA|Exercise ARCHIVES|41 Videos

  • THE P BLOCK ELEMENTS

    R SHARMA|Exercise Archives|40 Videos

Similar Questions

Explore conceptually related problems

Number of unpaired electrons in Fe^(2+) ion is

The number of unpaired electron(s) in Mg^(2+) ion is

Knowledge Check

  • The correct order of number of unpaired electron is

    A
    `Cu^(2+) gt Ni^(2+) gt Cr^(3+) gt Fe^(3+)`
    B
    `Ni^(2+) gt Cu^(2+) gt Fe^(3+) gt Cr^(3+)`
    C
    `Fe^(3+) gt Cr^(3+) gt Ni^(2+) gt Cu^(2+)`
    D
    `Cr^(3+) gt Fe^(3+) gt Ni^(2+) gt Cu^(2+)`

  • The correct order of number of unpaired electron is

    A
    `Cu^(2+) gt Ni^(2+) gt Cr^(3+) gt Fe^(3+)`
    B
    `Ni^(2+) gt Cu^(2+) gt Fe^(3+) gt Cr^(3+)`
    C
    `Fe^(3+) gt Cr^(3+) gt Ni^(2+) gt Cu^(2+)`
    D
    `Cr^(3+) gt Fe^(3+) gt Ni^(2+) gt Cu^(2+)`

  • The number of unpaired electron in Ni^(2+) is

    A
    0
    B
    2
    C
    3
    D
    4

    • Similar Questions

    Explore conceptually related problems

    The number of unpaired electron(s) in [Fe(H_2O)_6]^(2+) is

    The number of unpaired electrons in Cr^(3+) ion is

    Number of unpaired electron in Cu^(2+) is

    The number of unpaired electrons in Ce ^(3+) ion is 0

    Number of unpaired electrons in Fe^(3+) (Z = 26) is

    Home
    Profile