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Question:

Consider the hydrates ions of Ti²⁺, V²⁺, Ti³⁺ and Sc³⁺. The correct order of their spin-only magnetic moments is:

Sc³⁺<Ti³⁺<Ti²⁺<V²⁺

V²⁺<Ti²⁺<Ti³⁺<Sc³⁺

Sc³⁺<Ti³⁺<V²⁺<Ti²⁺

Ti³⁺<Ti²⁺<Sc³⁺<V²⁺

Solution:

Correct option is A. Sc³⁺<Ti³⁺<Ti²⁺<V²⁺
Solution:- (A) Sc³⁺<Ti³⁺<Ti²⁺<V²⁺
a) Ti²⁺=1s²2s²2p⁶3s²3p⁶
Unpaired electrons=2
Spin only magnetic moment(μ)=√2(2+2)=√8 B.M
b) Ti³⁺=1s²2s²2p⁶3s²3p⁶
Unpaired electrons=1
μ=√1(1+2)=√3 B.M
c) V²⁺=1s²2s²2p⁶3s²3p⁶
μ=√3(3+2)=√15 B.M
d) Sc³⁺=1s²2s²2p⁶3s²
μ=0