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Of the ions Zn^(2+),Ni^(2+) and Cr^(3+) ...

Of the ions `Zn^(2+),Ni^(2+) and Cr^(3+)` (atomic number Zn=30,Ni=28,Cr=24):

A

only `Zn^(2+)` is colourless and `Ni^(2+)` and `Cr^(3+)` are coloured.

B

all three are colourless.

C

all three are coloured.

D

only `Ni^(2+)` is coloured and `Zn^(2+)` and `Cr^(3+)` are colouless.

Text Solution

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The correct Answer is:
A
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