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The aqueous solution containing which on...

The aqueous solution containing which one of the following ions will be colourless
(Atomic number `Sc = 21, Fe = 26, Ri = 22, Mn = 25)`

A

`Sc^(3+)`

B

`Fe^(2+)`

C

`Ti^(3+)`

D

`Mn^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
A
`._(21)Scrarr1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(1).`
`Sc^(+3)rarr1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)`
Due to absence of electron it will be colourless.
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