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JEE Advanced2020ChemistryCoordination CompoundsActual

Choose the correct statement(s) among the following:

Options

  1. AFeCl 4 - has tetrahedral geometry.
  2. BCo ( en ) NH 3 2 Cl 2 + has 2 geometrical isomers.
  3. CFeCl 4 - has higher spin-only magnetic moment than Co ( en ) NH 3 2 Cl 2 +
  4. DThe cobalt ion in Co ( en ) NH 3 2 Cl 2 + has sp 3 d 2 hybridization.

Correct answer

A. FeCl 4 - has tetrahedral geometry.

Step-by-step solution

( A ) FeCl 4 - Oxidation number of Fe atom = + 3 Fe → 3 d 6 4 s 2 Fe 3 + → 3 d 5 ∴ FeCl 4 - is having tetrahedral geometry ( B ) Co ( en ) NH 3 2 + have three geometrical isomers. ( C ) FeCl 4 - is sp 3 hybridized with 5 -unpaired electrons. While Co ( en ) NH 3 2 Cl 2 + is d 2 sp 3 hybridised with zero unpaired electrons. ( D ) Co ( en ) NH 3 2 Cl 2 + has d 2 sp 3 hybridization.

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