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The valence shell electronic configurati...

The valence shell electronic configuration of `Cr^(2+)` ion is

A

`4s ^(0) 3d ^(4)`

B

`4s^(2)3d^(2)`

C

`4s^(2)3d^(0)`

D

`3p^(6)4s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Electronic configuration of chromium
`Cr to [Ar] 3d^(5) 4s^(1)`
`Cr ^(2+)to [Ar]3d^(4)4s ^(0).`
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NIKITA PUBLICATION-D-AND F-BLOCK ELEMENTS-MULTIPLE CHOICE QUESTIONS
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  2. Which of the following statement is not correct about transition metal...

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  3. The valence shell electronic configuration of Cr^(2+) ion is

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  4. In the first transition series, the highest b.p. and m.p. is of

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  5. Which of the following is for oxidatin of SO(2) to SO(3) in contact pr...

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  6. Amongst Cu^(+1), Fe ^(+2)and Cr^(+3) (At. No. Cu =29, Fe =26, Cr= 24...

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  7. In the following transition elements, the lowest m.p. and b.p.

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  8. Manganese belongs to

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  9. Colour of the Cu(2)O is due to

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  10. Which of the following ion is coloured ?

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  11. The transition metals have last electron entering into (n-1) d-orbital...

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  12. Transition elements have greater tendency to form complexes because

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  13. The electron which take part in order to exhibit variable oxidation st...

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  14. Variable oxidation state is shown by

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  15. Which of the following is wrong about interstitial compounds ?

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  16. The number of d-electrons retained in Fe^(2+) (At. No. Fe=26) ions are...

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  17. The colour of transition metal ion is attributed to:

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  18. Which one of the following ions is colourless ?

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  19. Which of the following transition metal ion will have magnetic moment ...

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  20. If n is the number of unpaired electrons, the magnetic moment (in BM) ...

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