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Out of the following ions Ti^(3+), V^(3+...

Out of the following ions `Ti^(3+), V^(3+), Cu^(+), Sc^(3+), Mn^(2+), Fe^(3+) and Co^(2+)` the colourless ions will be

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
Only those ions will be coloured which have incomplete d - orbitals. Ions which has complete or vacant d - orbitals are colourless.

As `Sc^(3+)` and `Cu^(+)` have `3d^(0) and 3d^(10)` configuration in their valence shell so their aqueous solutions are colourless. All others, i.e., `Ti^(3+), V^(3+), Mn^(2+), Fe^(3+) and Co^(2+)` are coloured in aqueous medium.
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NTA MOCK TESTS-THE D-AND F-BLOCK ELEMENTS TEST-SINGLE CHOICE
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  18. The pair in which both species have same magnetic moment is -

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