Match the free ions in List I with their spin-only magnetic moments in List II. List I: (P) Ti^3+, (Q) Fe^3+, (R) Ni^2+, (S) Cr^3+. List II: (1) 5.92 BM, (2) 1.73 BM, (3) 3.87 BM, (4) 2.83 BM.

JEE Main levelSingle correct optionDifficulty 2 of 3df017

Match the free ions in List I with their spin-only magnetic moments in List II. List I: (P) $Ti X^{3 +}$ , (Q) $Fe X^{3 +}$ , (R) $Ni X^{2 +}$ , (S) $Cr X^{3 +}$ . List II: (1) $5.92 BM$ , (2) $1.73 BM$ , (3) $3.87 BM$ , (4) $2.83 BM$ .

Unpaired electrons:

Ti X^{3 +}

(

d^{1}

) 1,

Fe X^{3 +}

(

d^{5}

) 5,

Ni X^{2 +}

(

d^{8}

) 2,

Cr X^{3 +}

(

d^{3}

) 3. With

μ = n (n + 2)

these give 1.73, 5.92, 2.83 and 3.87 BM, so P-2, Q-1, R-4, S-3.