JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

1 Medium

1 of 1

Understanding +4 | -1

For the ions

{Zn}^{2+}, {Ni}^{2+}

and

{Cr}^{3+}

which among the following statements is correct?

(atomic number of

{Zn}=30, {Ni}=28

and

{Cr}=24

)

View answer and explanation

Correct option: D

Only

{Zn}^{2+}

is colourless and

{Ni}^{2+}

and

{Cr}^{3+}

are coloured

Option D (Only

{Zn}^{2+}

is colourless and

{Ni}^{2+}

and

{Cr}^{3+}

are coloured) is correct because

{Zn}^{2+}

has a completely filled d-orbital configuration (

d^{10}

), making it colorless, while

{Ni}^{2+}

(

d^8

) and

{Cr}^{3+}

(

d^3

) have unpaired d-electrons and exhibit d-d transitions, resulting in color.

More Questions from d & f- BLOCK ELEMENTS