In which of the following pairs are both the ions coloured in aqueous solution [At. No. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27]

1. A. Ni 2+ , Ti 3+
2. B. Sc 3+ , Ti 3+
3. C. Sc 3+ , Co 2+
4. D. Ni 2+ , Cu +

Attempt this NEET 2006 Chemistry question free — pick an option to reveal the correct answer and a step-by-step explanation. Then join NEET Mastery Quest to practise 15,000+ PYQ and 2027-syllabus questions.