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The ion pair of the following in which b...

The ion pair of the following in which both the ions have unpaired electron-

A

`Cr^(3+),Co^(2+)`

B

`Sc^(3+),Cr^(3+)`

C

`Cu^(+),Fe^(3+)`

D

`Mn^(2+),Cu^(+)`

Text Solution

Verified by Experts

The correct Answer is:
A
`Cr^(+3)=4s^(@)3d^(3)`
`Co^(+2)=4s^(s)3d^(5)`
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BANSAL-D AND F BLOCK ELEMENTS-Exercise-1 (Single Correct Choice Type)
  1. Transition metals ions form interstial compounds because-

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  2. Paramagnetism is a property due to the presence of unpaired electrons....

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  3. The ion pair of the following in which both the ions have unpaired ele...

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  4. What happen when a solution of potassium chromate is treated with an e...

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  5. Transition elements act as catalyst because-

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  6. The radius of La^(+) (at no 57) is 1.06Å. What may be the radius of Lu...

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  7. Calomel is the name of

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  8. Cerium (Z= 58) is an important nember of the lanthanoids . Which of th...

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  9. Excess of KI reacts with CuSO(4) solution and Na(2)SO(3) solution is a...

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  10. Formula of chromyl chloride is-

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  11. Calomel (H(2)Cl(2)) on reaction with ammonium hydroxide gives

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  12. The reaction, 2Cu^(+)toCu+Cu^(2+) is called-

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  13. The lanthanide contraction is responsible for the fact that

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  14. Amongst [TiE(6)]^(2-), [CoF(6)]^(3-), Cu(2)Cl(2) and [NiCl(4)]^(2-) [A...

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  15. Lanthanoid contraction is caused due to:

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  16. CrO(3) is a//an"….."

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  17. Which of the following is expected to have lowest magnetic moment-

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  18. Identify the incorrect statement among the following.

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  19. Which of the following ion has the maximum magnetic moment?

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  20. Transition elements are usually characterised by variable oxidation st...

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