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Which of the following species with d^(6...

Which of the following species with `d^(6)` configuration is stable in the presence of strong complexing reagents ?

A

Fe `( +2)`

B

Co `( +3)`

C

Cu `( +1)`

D

Ni `( +2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Iron `(+2)` and `Co(+3)` are important species with this configuration. Iron `(+2)` is quite stable although a mild reducing and `Co(+3)` is stable in the presence of strong complexing agents. `Ni(+2)` is the most important species with `d^(8)` configuration.
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R SHARMA-THE D AND F BLOCK ELEMENTS-Follow-up Test 2
  1. Which of the following has the highest melting point in the first row ...

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  2. Which of the following has the lowest enthalpy of atomisation ?

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  3. Which of the following d-block metals has the highest boiling point ?

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  4. Which of the folling d-block metals has the highest density ?

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  5. Atoms of d-block elements in a given period are smaller than those of ...

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  6. Which of the following statement is correct ?

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  7. Which of the following d-block elements has the bigger covalent radius...

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  8. Which of the following statement is correct regarding 3d-series of ele...

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  9. Which of the d-block elements has the lowest electronegativity ?

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  10. The noble charactoer of platinum and gold is favoured by

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  11. Which of the following is correct for d-block metals ?

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  12. The d-block elements exhibit variable oxidation states. The serveral d...

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  13. Which of the following transition elements does not exhibit variable o...

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  14. Which of the 3d-seres of the transition metals exhibits the leagest nu...

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  15. Which of the following has d^(1) configuration and is stable ?

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  16. Which of the following has d^(3) configuration and is quite stable ?

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  17. Which of the following species with d^(6) configuration is stable in ...

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  18. Which of the following is the strongest oxidizing agent ?

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  19. Which of the following couples has the most positive E^(Theta) value ?

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  20. Which of the following statements is correct ? (1) The highst oxidat...

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