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Which one of the following pairs of ions...

Which one of the following pairs of ions have the same electronic configuration

A

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

B

`Fe^(+3),Mn^(+2)`

C

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

D

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

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -1 ( BLOCKS AND TYPES OF ELEMENTS)
  1. Most of the non-metals are present in the long form of the periodic ta...

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  2. Metal used as catalyst in the hydrogenation of vegetable oils

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  3. Tile 4f-subshell is successively filled for

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  4. The role of 'Molybdenum' in Uaber's synthesis is

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  5. The period in which s-block, p-block and d- block elements are present

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  6. Elements of p-block are

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  7. The following ion is colourless in aqueous solution ?

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  8. Which of the following electronic configuration corresponds to an iner...

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  9. The rare gas that is most abundant in the atmosphere is

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  10. In lanthanides, the differentiating electron enters into

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  11. Which is not a transition metal?

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  12. The general electronic configuration (n - 1)d^3ns^2? indicates that th...

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  13. The configuration of chromium atom in ground state is

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  14. Which one of the following pairs of ions have the same electronic conf...

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  15. The electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2) represents

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  16. What is wrong about transition metals?

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  17. Which of the following is a rare earth element?

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  18. Transition element exhibit variable valency on account of …… d- orbita...

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  19. Which one of the following is correct about stability of the given ion...

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  20. The transition element among the following is

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