The total number of stereoisomers (geometrical plus optical) of the octahedral ion $[Co (en) X_{2} Cl X_{2}] X^{+}$ is

Answer: B

The trans isomer has a mirror plane and is optically inactive (1). The cis isomer lacks any mirror plane or centre and exists as a pair of enantiomers (2). Total

= 1 + 2 = 3

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The total number of stereoisomers (geometrical plus optical) of the octahedral ion [Co(en)X2​ClX2​]X+ is

Answer: B

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The total number of stereoisomers (geometrical plus optical) of the octahedral ion $[Co (en) X_{2} Cl X_{2}] X^{+}$ is