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Assertion (A) [Fe(CN)(6)]^(3-) ion shows...

Assertion (A) `[Fe(CN)_(6)]^(3-)` ion shows magnetic moment corresponding to two unpaired electrons.
Reason (R) Because it has `d^(2)sp^(3)` type hybridisation.

A

Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

C

Statement-1 is True, Statement-2 is False.

D

Statement-1 is False, Statement-2 is True.

Text Solution

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The correct Answer is:
D
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The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer. Assertion : [Fe(CN)_6]^(3-) has d^(2)sp(3) hybridisation . Reason : [Fe(CN)_6]^(3-) shows magnetic moment corresponding to two unpaired electrons . Reason : [Fe(CN)_6]^(3-) shows magnetic moment corresponding to two unpaired electrons .

Assertion (A) : Mercurous ion is paramagnetic. Reason (R ): It contains one unpaired electron.

These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: [Fe(CN)_6]^(3-) has d^2sp^3 type hybridisation. Reason: [Fe(CN)_6]^(3-) ion shows magnetic moment corresponding to two unpaired electrons.

Assertion: Transition metal ion forming octahedral complexes undergo sp^(3)d^(2) or d^(2) sp^(3) hybridisation. Reason: Strong field ligands force the unpaired electrons of central metal ion to pair up causingg d^(2)sp^(3) hybridisation whereas weak field ligands do not affect electronic configuration of the metal ion undergoes in sp^(3)d^(2) hybridisation.

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