question_answer 109)

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

Answer:

                    (c) Assertion is not true but reason is true. Actinoids form relatively more stable complexes as compared to lanthanoids because of actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbitals for bonding.