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Assertion : Actinoids from relatively less stable complexes as compared to lanthanoids. Reason : Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding bu lanthanoids do not use their 4f orbital for bonding.

Answer»

Both assertion and reason are true and reason is the CORRECT explanation of the assertion .
Both assertion and reason are true but reason is not the correc explanation of assertion.
Assertion is not true for reason is true
Both assertion and reason are false.

Solution :Correct ASSERTON. Actinoids form relatively more stable COMPLEXES than lanthanoids ( as the latter have low CHARGE density )


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