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Which of the following triads have appro...

Which of the following triads have approximately equal size ?

A

`Na^(+) , Mg^(2+) , Al^(3+)` (iso-electronic)

B

`F^(-), Ne , O^(2-)` (iso-electronic)

C

Fe , Co , Ni

D

`Mn^(+) , Fe^(2+) , Cr` (iso-electronic)

Text Solution

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The correct Answer is:
C
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NARAYNA-PERIODIC TABLE -All Questions
  1. S-1 : Formation of Mg^(2+) and Al^(3+) , both require the absorption o...

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  2. N(0)//2 atoms of X(g) are converted into X^(+) (g) by energy E(1) . N(...

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  3. Which of the following triads have approximately equal size ?

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  4. Ionic radii of :

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  5. When the following five anions are arranged in order of decreasing ion...

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  6. (a),(b) and (c) are elements in the second short period. Oxide of (a) ...

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  7. The sizes of the second and third row transition elements being almost...

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  8. EN of the element (A) is E(1) and EA is E(2) hence IP will be :

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  9. For the element X, student Surbhi measured its radius as 102 nm, Mr. G...

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  10. The effective nuclear charge on the added electron in F-atom , in the ...

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  11. Covalent radius of F is 0.72 A^(@) . Calculate its Allred-Rochow's ele...

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  12. Covalent radius of oxygen is 0.74 A^(@) and its A .R. electronegativi...

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  13. There are four elements 'P' , 'q' , 'r' and 's' having atomic numbers ...

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  14. Which of the following statements are correct? (i) Generally the ra...

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  15. The correct order of atomic radii of the following element Sm(z=62), E...

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  16. Consider the following ionization steps : M(g) rarr M^(+)(g) +e^(-),...

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  17. Which of the following show amphoteric behaviour? a)Zn(OH)(2) b)BeO c)...

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  18. In which of the following arrangements, the order is not correct accor...

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  19. Which of the following statement(s) is /are correct?

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  20. Which of the following statements is/are correct?

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