Question
Choose the correct statement(s) among the following:
JEE Advanced
Chemistry
Coordination Compounds
2020
JEE Advanced 2020 (Paper 1)
JEE Advanced Chemistry Question (2020) — Solution
Options
- A. FeCl 4 - has tetrahedral geometry.
- B. Co ( en ) NH 3 2 Cl 2 + has 2 geometrical isomers.
- C. FeCl 4 - has higher spin-only magnetic moment than Co ( en ) NH 3 2 Cl 2 +
- D. The cobalt ion in Co ( en ) NH 3 2 Cl 2 + has sp 3 d 2 hybridization.
Answer
C. FeCl 4 - has higher spin-only magnetic moment than Co ( en ) NH 3 2 Cl 2 +
Step-by-step solution
( A ) FeCl 4 - Oxidation number of Fe atom = + 3 Fe → 3 d 6 4 s 2 Fe 3 + → 3 d 5 ∴ FeCl 4 - is having tetrahedral geometry ( B ) Co ( en ) NH 3 2 + have three geometrical isomers. ( C ) FeCl 4 - is sp 3 hybridized with 5 -unpaired electrons. While Co ( en ) NH 3 2 Cl 2 + is d 2 sp 3 hybridised with zero unpaired electrons. ( D ) Co ( en ) NH 3 2 Cl 2 + has d 2 sp 3 hybridization.
Related: Chemistry — Coordination Compounds · All PYQ Banks