Question

In which of the following pairs, both the ions are coloured in aqueous solutions?
(a) Sc3+, Ti
(b) Sc3+, Co2+
(c) Ni2+, Cu+
(d) Ni2+, Ti3+
[Atomic no of Sc = 21, Ti = 22, Ni = 28, Co = 27, Cu = 29]

Answer 1

Answer:

Option (d) is the right answer

Explanation:

Due to presence of unpaired d- orbital electrons.

Ti3+ has 1 d orbital electron and is purple in color.

Ni2+ has 8 d orbital electron and has Green color.

Answer 2

Answer:

d. is the correct answer

Explanation:

hope the answer will help you ☺❤