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Visualising Orbitals

Which one of ...

Question

Which one of the following ion exhibits colour in aqueous solution ?

^{3 +}

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^{2 +}

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^{4 +}

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^{+ 2}

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Solution

The correct option is B Ni $^{2 +}$
Only $N i^{+ 2}$ has incomplete d-orbitals $d^{8}$ so it is colourfull. $S c^{+ 3}, T i^{+ 4}; d^{0}$ configuration and $Z n^{+ 2}, d^{10}$ configuration so they are colourless.

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Similar questions

T i^{3 +}, V^{3 +} (i i) C u^{+}, S c^{3 +} (i i i) F e^{2 +}, F e^{3 +} (i v) C o^{2 +}, N i^{2 +} (v) Z n^{2 +}, A g^{+}

T i^{3 +}, V^{3 +}

C u^{+}, S c^{3 +}

F e^{2 +}, F e^{3 +}

C o^{2} +, N i^{2 +}

Z n^{2 +}, A g^{+}

A g^{+}, C o^{+ 2}

T i^{+ 4}

3 d

+ 1

S c^{3 +}, V^{3 +}, T i^{4 +}, M n^{2 +}

S c = 21, V = 23, T i = 22, M n = 25

S c = 21, T i = 22, N i = 28, C u = 29, C o = 27

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