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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

[ N i ( C O ) 4 ] - s p 3 - Diamagnetic [ N i C l 4 ] 2 - - s p 3 - Paramagnetic [ C o ( N H 3 ) 4 C l 2 ] C l - d 2 s p 3 - Diamagnetic N a 3 [ C o F 6 ] - s p 3 d 2 - Paramagnetic N a 2 O 2 i.e. O 2 2 - - Diamagnetic C s O 2 i.e. O 2 - - Paramagnetic

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