Question

Assertion :$\left[Ti\right(H_{2}O{)}_6{]}^{3+}$ is coloured while $\left[Sc\right(H_{2}O{)}_6{]}^{3+}$ is colourless. Reason: d-d transition is not possible in $\left[Sc\right(H_{2}O{)}_6{]}^{3+}$

• 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. Assertion is incorrect but Reason is correct

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

$\left[Ti\right(H_{2}O{)}_6{]}^{3+}$ contains one unpaired electron and hence is purple colored whereas in $\left[Sc\right(H_{2}O{)}_6{]}^{3+}$, all the electrons are paired and hence is colorless. d-d transition is not present in $\left[Sc\right(H_{2}O{)}_6{]}^{3+}$.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.