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Four successive members of the first ser...

Four successive members of the first series of the transition metals are listed below. For which one of them, the standard potential value has a positive sign?

A

`Cu (Z=29)`

B

`Fe (Z=26)`

C

`Co(Z=27)`

D

`Ni(Z=28)`

Text Solution

Verified by Experts

The correct Answer is:
A
Cooper does not liberate `H_2 ` gas from acids and thus shows positive value of `E^@ (E^@ " for" Cu^(2+) //Cu " is" + 0.34 V)` . For other metals `E^@` value is negative.
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BRILLIANT PUBLICATION-THE D-AND F-BLOCK ELEMENTS-QUESTIONS (LEVEL-III)
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  4. An inorganic compound on strong heating gave a blackish brown powder a...

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  5. MnO(2) overset(I)(to)MnO(4)^(2-)overset(II)(to)MnO(4)^(-) I and II are

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  6. Identify the product and its colour when MnO2 is fused with solid KOH ...

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  7. When manganous salt is fused with a mixture of KNO3 and solid NaOH, th...

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  8. Consider following statements, I. The size of the lanthanide M^(3+) io...

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  9. Most transition metals I:forms sets of compounds which display differe...

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  10. [Fe(H2 O)5 NO]^(2+) is brown-ring complex. In this complex

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  11. When K2 CrO4 is added to CuSO4 solution, there is formation of CuCrO4...

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  12. Select the correct statements(s)

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  13. Which of the following statements are true?

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  14. Although +3 is the characteristic oxidation state for lanthanoids, cer...

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  15. Select correct statements.

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  16. When CO2 is passed into aqueous

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  17. Select correct statements (s)

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  18. Which of the following statements are correct

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  19. Amongst the following, identify the species with an atom in +6 oxidati...

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  20. Which metals are present in german silver?

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  21. The complex forming tendency of a transition metal depends upon:

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