Question

Assertion : The chemistry of the early actinoids is more complicated than the corresponding lanthanoids.
Reason: Outer electronic configuration of actinoids is $\left(n-2\right)f ^{1-14}\left(n-1\right)d^{0-1} ns^{2}$.

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

Answer 1

Answer: (B)

The chemistry of the early actinoids is more complicated than the corresponding lanthanoids, due to the large number of oxidation states possible for these actinoids and their radioactive nature.