Question

Assertion: $\left[Cr\right(H_{2}O{)}_6]C{l}_2$ and $\left[Fe\right(H_{2}O{)}_6]C{l}_2$ are reducing in nature.

Reason: Unpaired electrons are present in d-orbitals.

• A. Assertion is true, reason is false.
  
• B. Assertion and reason both are true but reason is not the correct explanation of assertion.
  
• C. Assertion is false, reason is true.
  
• D. Assertion and reason both are true, reason is correct explanation of assertion.
  

Answer 1

The correct option is B Assertion and reason both are true but reason is not the correct explanation of assertion.


Analysing the assertion

$\left[Cr\right(H_{2}O{)}_6]C{l}_2$ and $\left[Fe\right(H_{2}O{)}_6]C{l}_2$ are reducing in nature as they undergo self-oxidation easily. it occurs because both the complexes become more stable by the oxidation of the metal ion to $C{r}^{3+}andF{e}^{3+}$.

The electron get ionised easily to from a more stable half-filled or fully filled electronic configuration.

So, the assertion is a correct statement.

Analysing the reason

$\left[Cr\right(H_{2}O{)}_6]C{l}_2$ and $\left[Fe\right(H_{2}O{)}_6]C{l}_2$ both the complexes have unpaired electrons in their d-orbitals.


So, the assertion is a correct statement.

Hence, both the assertion and the reason are correct statements, but the reason is not the correct explanation for the assertion.

So, option (B) is the correct answer.