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Physical Properties of Boron Family

Assertion :St...

Question

Assertion :Statement $-$ 1 : After splitting of d $-$ orbitals during complex formation, the orbitals form two sets of orbitals $t_{2 g}$ and $e_{g}$ octahedral field. Reason: Statement $-$ 2 : Splitting of d $-$ orbitals occurs only in the case of strong field ligands such as $C N^{-} .$

Statement

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1 is true, Statement

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2 is true and Statement

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2 is correct explanation for Statement

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Statement

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1 is true, Statement

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2 is true and Statement

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2 is NOT the correct explanation for Statement

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Statement

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1 is true, Statement

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2 is false.

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Statement

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1 is false, Statement

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2 is true.

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Solution

The correct option is C Statement $-$ 1 is true, Statement $-$ 2 is false.
After splitting of d orbitals during complex formation, the orbitals form two sets of orbitals $t_{2 g}$ and $e_{g}$ octahedral field.
$t_{2 g}$ orbitals are lower in energy and $e_{g}$ orbitals are higher in energy.
Splitting of d orbitals occurs only in the case of strong field ligands as well as weak field ligands.
Strong field ligands will cause pairing of the electrons whereas weak field ligands do not cause pairing of electrons.
Statement 1 is true, Statement 2 is false.

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Assertion :Statement − 1 : After splitting of d − orbitals during complex formation, the orbitals form two sets of orbitals t2g and eg octahedral field. Reason: Statement − 2 : Splitting of d − orbitals occurs only in the case of strong field ligands such as CN−.

Assertion :Statement $-$ 1 : After splitting of d $-$ orbitals during complex formation, the orbitals form two sets of orbitals $t_{2 g}$ and $e_{g}$ octahedral field. Reason: Statement $-$ 2 : Splitting of d $-$ orbitals occurs only in the case of strong field ligands such as $C N^{-} .$