Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

Two complexes [Cr(H2O6)Cl3] (A) and [Cr(NH3)6]Cl3 (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is :

  1. A

    value of (A) is less than that of (B)

  2. B

    value of (A) and (B) are calculated from the energies of violet and yellow light, respectively

  3. C

    Bothe absorb energies corresponding to their complementary colors

  4. D

    Bothe are paramagnetic with three unpaired electrons

Solution

Both (A) and (B) are paramagnetic with 3 unpaired electrons each. The splitting energy (0 ) values of (A) and (B) are calculated from the wavelengths of light absorbed and not from the wavelengths of light emitted. H2O is a weak field ligand causing lesser splitting than NH3 which is relatively stronger field ligand. 

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