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In which of the following paris both the...

In which of the following paris both the ions are coloured in aqueous solution? (Atomic number, `Sc - 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)`

A

`Sc^(3+), Co^(2+)`

B

`Ni^(2+), Cu^(+)`

C

`Ni^(2+), Ti^(3+)`

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
`Sc^(3+) rArr` no unpaired electron
`Ca^(+) rArr` no unpaired electron
`Cu^(+) rArr` no unpaired electron
`Ni^(2+) rArr `2 unpaired electrons
`Ti^(3+) rArr` 1 unpaired electron
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Knowledge Check

  • In which of the following paris, both ions are coloured in aqueous solution?

    A
    `Ni^(2+),Ti^(4+)`
    B
    `Ni^(2+),Ti^(3+)`
    C
    `Sc^(3+),Ti^(3+)`
    D
    `Cr^(2+),Zn^(2+)`

  • In which of the following pairs are both the ions coloured in aqueous solution-

    A
    ` Ni^(2+), Ti^(3+) `
    B
    `Sc^(3+),Ti^(3+)`
    C
    `Sc^(3+), Co^(2+)`
    D
    `Ni^(2+), Cu^(+)`

  • Which of the following pair are both the ions coloured in aqueous solution ("At. no." Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

    A
    `Sc^(3+), Co^(2+)`
    B
    `Ni^(2+),Cu^(+)`
    C
    `Ni^(2+),Ti^(3+)`
    D
    `Sc^(3+),Ti^(3+)`
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