JEE MAIN - Chemistry (2021 - 25th July Morning Shift - No. 1)
Which one of the following species responds to an external magnetic field?
[Fe(H2O)6]3+
[Ni(CN)4]2$$-$$
[Co(CN)6]3$$-$$
[Ni(CO)4]
Explanation
1. $${[\mathop {Fe}\limits^{ + 3} {({H_2}O)_6}]^{3 + }}$$
$$F{e^{3 + }}:[Ar]3{d^5}$$
Hybridisation : $$s{p^3}{d^2}$$
Magnetic nature : Paramagnetic (so this complex response to external magnetic field)
2. $${[Ni{(CN)_4}]^{2 - }}$$
$$N{i^{2 + }}:[Ar]3{d^8}$$
Hybridisation : dsp2
Magnetic nature : diamagnetic
3. $${[Co{(CN)_6}]^{3 - }}$$
$$C{o^{3 + }}:[Ar]3{d^6}$$
Hybridisation : $${d^2}s{p^3}$$
Magnetic nature : diamagnetic
4. $$[Ni{(CO)_4}]$$
$$Ni:[Ar]3{d^8}4{s^2}$$
Hybridisation : $$s{p^3}$$
Magnetic nature : diamagnetic
$$F{e^{3 + }}:[Ar]3{d^5}$$
Hybridisation : $$s{p^3}{d^2}$$
Magnetic nature : Paramagnetic (so this complex response to external magnetic field)
2. $${[Ni{(CN)_4}]^{2 - }}$$
$$N{i^{2 + }}:[Ar]3{d^8}$$
Hybridisation : dsp2
Magnetic nature : diamagnetic
3. $${[Co{(CN)_6}]^{3 - }}$$
$$C{o^{3 + }}:[Ar]3{d^6}$$
Hybridisation : $${d^2}s{p^3}$$
Magnetic nature : diamagnetic
4. $$[Ni{(CO)_4}]$$
$$Ni:[Ar]3{d^8}4{s^2}$$
Hybridisation : $$s{p^3}$$
Magnetic nature : diamagnetic
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