(A) : Chemistry of Lanthanoids is more complicated than Actinoids.
(R) : All Lanthanoid elements are radioactive & manmade.

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

(A) is true but (R) is false

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Chemistry of actinoids is complicated as compared to lanthanoids because of the following reasons:
i. Actinoids are radioactive.
ii. Actinoids show wide range of oxidation states as energy difference between 5f, 6d and 7s subshells of the actinoids is small.

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th