JEE Main 1-Sep-2021 Shift 2 Solved Paper

The crystal field stabilisation energy (CFSE) and magnetic
moment (spin - only) of CO2+ octahedral aqua complex are −0.8Δ0 and 3.87‌BM respectively. CFSE =[(e−in t2g)×(−0.4)+(e−in eg)×0.6]‌Δ0
=[5×−0.4+2×0.6]Δ0
=−0.8Δ0
Magnetic moment (spin only) can be calculated as:
μ=√n(n+2)
(where, µ = spin only magnetic moment and
n = number of unpaired electrons = 3
=√3(3+2)=√15=3.87‌BM