Assertion : $[C o (N H_{3})_{4} C l_{2}]^{+}$ can exist in cis-and trans-forms but neither can display optical activity. Reason: Each of these possesses at least one plane of symmetry.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The complex $[C o (N H_{3})_{4} C l_{2}]^{+}$ is of the type $[M a 4 b 2]$ . It can exhibit geometrical isomerism as two chlorine ligands can be cis in one isomer and trans in other isomer. However, both the isomers contains a plane of symmetry and hence optical isomerism is not possible.

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Choose the correct option.

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