Multiple choice

Arrange the following transition metal ions in increasing order of their magnetic moments.

  1. Ti2+
  2. V2+
  3. Cr2+
  4. Mn2+ Select the correct answer using the codes given below:

  1. 1 < 2 < 3 < 4

  2. 1 < 3 < 2 < 4

  3. 2 < 1 < 4 < 3

  4. 3 < 2 < 4 < 1

  5. 4 < 3 < 2 < 1
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A Correct answer
Explanation

The magnetic moment increases with increasing number of unpaired electrons. Ti2+: [Ar] 3d2; 2 unpaired electrons V2+ : [Ar] 3d3; 3 unpaired electrons Cr2+: [Ar] 3d4; 4 unpaired electrons Mn2+: [Ar] 3d5; 5 unpaired electrons Hence, the correct order of magnetic moment is Ti2+ < V2+ < Cr2+ < Mn2+.

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