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JEE Advanced2016ChemistryCoordination CompoundsActual

Among N i C O 4 , N i C l 4 2 - , C o N H 3 4 C l 2 C l , N a 3 C o F 6 , N a 2 O 2 and C s O 2 , the total number of paramagnetic compounds is

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

B. 3

Step-by-step solution

Compound/Ion Unpaired Electron Magnetic nature of compound 1] N i C O 4 3d 10 ,   sp 3 0 Diamagnetic 2] C o N H 3 4 C l 2 C l 3 d 6 ,   d 2 sp 3 0 Paramagnetic 3] N i C l 4 2 - 3 d 8 ,   sp 3 2 Diamagnetic 4] N a 3 C o F 6 3 d 6 ,   sp 3 d 2 4 Paramagnetic 5] N a 2 O 2 O 2 2 - 0 Diamagnetic 6] C s O 2 O 2 - 1 1 Paramagnetic So, the total number of paramagnetic compounds is 3 .

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