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Which of the following complexes formed ...

Which of the following complexes formed by `Cu^(2+)` ions is most stable -

A

`Cu^(2+) +4NH_(3)hArr [Cu(NH_(3))_(4)]^(2+),logK=11.6`

B

`Cu^(2+)+4CN^(-)hArr [Cu(CN)_(4)]^(2-),logK=27.3`

C

`Cu^(2+)+2en hArr [Cu(en)_(3)]^(2+), logK=15.4`

D

`Cu^(2+)+4H_(2)OhArr [Cu(H_(2)O)_(4)]^(2+), logK=8.9`

Text Solution

Verified by Experts

The correct Answer is:
B
Stability increases as the value of K and hence log K increases.
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Knowledge Check

  • Which of the following is most stable?

    A
    `Sn^(2+)`
    B
    `Ge^(2+)`
    C
    `Si^(2+)`
    D
    `Pb^(2+)`

  • Which of the following ions cannot be formed by boron-

    A
    `BF_6^(3-)`
    B
    `BH_4^(-)`
    C
    `B(OH)_4^(-)`
    D
    `BO_2^(-)`

  • Which of the following ions can form complexes-

    A
    `Al^(3+)`
    B
    `Cu^(2+)`
    C
    `Cr^(3+)`
    D
    `Fe^(2+)`

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