Question

Assertion :$K_{2}PtC{l}_6$ is well-known compound whereas corresponding $Ni$ compound is not known. Reason: $P{t}^{+4}$ is thermodynamically more stable than $N{i}^{+4}$.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
As the $K_{2}PtC{l}_6$ is well known due to the thermodynamically more stable oxidation state of $Pt$, which is $+4$, here, whereas $Ni$ can not form this compound, due to less stability, of $+4$.
Hence, $Pt$ complexes with $Pt\left(IV\right)$ form are more stable, whereas $Ni$ form stable complex in $Ni\left(II\right)$, form.