Question

Match List-I with List-II.}

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-IV, B-I, C-II, D-III

Answer 1

The Correct Option is D

Concept: Crystal field splitting depends on ligand strength. Spectrochemical series: \[ CN^->en>H_2O>F^- \] Thus the splitting energy order: \[ [Cr(CN)_6]^{3-}>[Cr(en)_3]^{3+}>[Cr(H_2O)_6]^{3+}>[CrF_6]^{3-} \]
Step 1:Arrange \(\Delta_0\)} Largest \(\Delta_0\): \[ 26,600 \] Smallest \(\Delta_0\): \[ 15,060 \]
Step 2:Match complexes} \[ [Cr(CN)_6]^{3-} \rightarrow 26,600 \] \[ [Cr(en)_3]^{3+} \rightarrow 22,300 \] \[ [Cr(H_2O)_6]^{3+} \rightarrow 17,400 \] \[ [CrF_6]^{3-} \rightarrow 15,060 \] Thus \[ A-IV,\ B-I,\ C-II,\ D-III \] \[ \boxed{A-IV,\ B-I,\ C-II,\ D-III} \]