Assertion :Complexes of $M X_{6}$ and $M X_{5} L$ type (X and L are unidentate) do not show geometrical isomerism. Reason: Geometrical isomerism is not shown by complexes of coordination number $6$ .

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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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
In ${M X}_{6} & {M X}_{5} L$ , their shape is Square Bipyramidal. In a plane, there are four atoms, all are same, linked to the metal atom, so they don't show geometrical isomerism.
So, the assertion is correct.
If the ligands present in complexes are Bidentate. Then they will show optical isomerism. So, reason is incorrect.

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Similar questions

In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are true, reason is correct explanation of assertion.
(b) Assertion and reason both are true but reason is not the correct explanation of assertion.
(c) Assertion is true, reason is false.
(d) Assertion is false, reason is true.

Assertion (A) Complexes of $M X_{6}$ and $M X_{5} L$ type (X and L are unidentate) do not show geometrical isomerism.
Reason (R) Geometrical isomerism is not shown by complexes of coordination number 6.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
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(e) Assertion is incorrect but reason is correct.

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

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Assertion :Complexes of MX6 and MX5L type (X and L are unidentate) do not show geometrical isomerism. Reason: Geometrical isomerism is not shown by complexes of coordination number 6.

Assertion :Complexes of $M X_{6}$ and $M X_{5} L$ type (X and L are unidentate) do not show geometrical isomerism. Reason: Geometrical isomerism is not shown by complexes of coordination number $6$ .