The ions from among the following which are colourless are:(i) Ti4+ (ii) Cu+ (iii) Co3+ (iv) Fe2+

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

(i) and (ii) only

(i), (ii) and (iii)

(iii) and (iv)

(ii) and (iii).

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

(i) Valence shell electron configuration of Ti4+ is 3d04s0. As there is no unpaired electrons for d-d transition, the solution of ions will be colourless.(ii) Valence shell electron configuration of Cu+ is 3d104s0. As all electrons are paired, there is no d-d transition, so the solution of ions will be colourless.(iii) Valence shell electron configuration of Co3+ is 3d64s0. As there are 4 unpaired electrons, there is d-d transition of electron, so the solution of ions will be coloured.(iv) Valence shell electron configuration of Fe2+ is 3d64s0. As there are 4 unpaired electrons, there is d-d transition of electron, so the solution of ions will be coloured.

Watch 3-min video & get full concept clarity