Assertion : $[C o C l_{3} (N H_{3})_{3}]$ does not give white precipitate with $A g N O_{3}$ solution. Reason: $[C o C l_{3} (N H_{3})_{3}]$ complex is optically inactive.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The $[C o C l_{3} (N H_{3})_{3}]$ complex contains elements of symmetry and is optically inactive.
It does not give white precipitate with silver nitrate solution as chlorine is present in the coordination sphere.
Thus Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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(d) Both assertion and reason are incorrect
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Assertion :[CoCl3(NH3)3] does not give white precipitate with AgNO3 solution. Reason: [CoCl3(NH3)3] complex is optically inactive.

Assertion : $[C o C l_{3} (N H_{3})_{3}]$ does not give white precipitate with $A g N O_{3}$ solution. Reason: $[C o C l_{3} (N H_{3})_{3}]$ complex is optically inactive.