JEE Main201910 Apr 2019Morning ShiftChemistryd and f Block ElementsActual
Consider the hydrated ions of T i 2 + , V 2 + , T i 3 + and S c 3 + . The correct order of their spin-only magnetic moments is:
Options
- AS c 3 + < T i 3 + < V 2 + < T i 2 +
- BT i 3 + < T i 2 + < S c 3 + < V 2 +
- CS c 3 + < T i 3 + < T i 2 + < V 2 +
- DV 2 + < T i 2 + < T i 3 + < S c 3 +
Correct answer
C. S c 3 + < T i 3 + < T i 2 + < V 2 +
Step-by-step solution
Magnetic moment μ = n n + 2 More than value of n, more will be magnetic moment. T i + 2 electronic configuration; 3 d 2 μ = 2 2 + 2 = 2.82 Ti + 3 ⇒ 3 d 1 μ = 1 1 + 2 = 3 = 1.73 V + 2 ⇒ 3 d 3 μ = 3 3 + 2 = 3.87 S c 3 + ⇒ A r no unpaired electron. → μ = 0 Hence Order of Magnetic Moment is V + 2 > T i + 2 > T i + 3 > S c + 3