Question
Which of the following are paramagnetic? A. [ NiCl _4 ]^ 2- B. Ni ( CO )_4 C. [ Ni ( CN )_4 ]^ 2- D. [ Ni ( H _2 O )_6 ]^ 2+ E. Ni ( PPh _3 )_4 Choose the correct answer from the options given below :
NEET
Chemistry
Coordination Compounds
2025
NEET 2025
NEET Chemistry Question (2025) — Solution
Options
- A. A and C only
- B. B and E only
- C. A and D only
- D. A , D and E only
Answer
C. A and D only
Step-by-step solution
(A) [ NiCl _4 ]^ 2- Oxidation state =+2 Electronic configuration =3 d^8 4 s^0 Cl = W.F.L. No Pairing (D) [ Ni ( H _2 O )_6 ]^ 2+ Oxidation state =+2, configuration =3 ~d ^8 H _2 O is W.F.L. No pairing Hence both are paramagnetic.
Related: Chemistry — Coordination Compounds · All PYQ Banks