Assertion :Complexes containing three bidentate ligands do not show optical activity. Reason: Octahedral complex $[C o (N H_{3})_{4} C l_{2}] C l$ shows geometrical isomerism.

Stalement-1 is true, statement-2 is true; statement-2 is a correct explanation for statement-1

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Statement-1 is true, statement-2 is true; statement-2 is NOT a correct explanation for statement-1

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Statement-1 is true, statement-2 is false

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Statement-1 is false, statement-2 is true

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Solution

The correct option is D Statement-1 is false, statement-2 is true
Optical isomers are pair of molecules which are non-superimposable mirror image to each other.

Complexes containing three bidentate ligands show optical activity as shown in the figure since the mirror image is non-superimposable.

Octahedral complex $[C o (N H_{3})_{4} C l_{2}] C l$ shows geometrical isomerism. Since, two different ligands $C l$ and $N H_{3}$ are placed adjacent and opposite to similar ligands, this complex shows both cis-trans isomerism.

Therefore, the assertion is incorrect but the reason is true.

Hence, the correct option is (D).

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Similar questions

Statement - 1: Complexes containing three bidentate ligands do not show optical activity.
Statement - 2: Octahedral complex $[C o (N H_{3})_{4} C l_{2}] C l$ shows geometrical isomerism.

Q. Statement

- 1 :

0 < x < y \Rightarrow {log}_{a} x > {log}_{a} y

, where

a > 1

.
Statement

- 2 :

When

a > 1, {log}_{a} x

is an increasing function.

Statement - 1: Complexes containing three bidentate ligands do not show optical activity.
Statement - 2: Octahedral complex $[C o (N H_{3})_{4} C l_{2}] C l$ shows geometrical isomerism.

Q. Statement-1:

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} = (n + 2) 2^{n - 1} .

Statement-2:

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} x^{r} = (1 + x)^{n} + n x (1 + x)^{n - 1} .

Q. Statement-1:

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} = (n + 2) 2^{n - 1} .

Statement-2:

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} x^{r} = (1 + x)^{n} + n x (1 + x)^{n - 1} .

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Assertion :Complexes containing three bidentate ligands do not show optical activity. Reason: Octahedral complex [Co(NH3)4Cl2]Cl shows geometrical isomerism.

Assertion :Complexes containing three bidentate ligands do not show optical activity. Reason: Octahedral complex $[C o (N H_{3})_{4} C l_{2}] C l$ shows geometrical isomerism.