Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason (R):	Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is not True but (R) is True.
4.	Both (A) and (R) are False.