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Actinides with 5f1, 5f5 and 5f8 electronic configuration are not known.

Lanthanides with 4f2 and 4f8 electronic configuration are not known.

Lanthanoid compounds are less basic than actinoid compounds.

Lanthanoid compounds have more tendency towards complex formation.

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detailed solution

Correct option is D

Correct (4).Due to low charge density, lanthanoid have less tendency to form complex. The tendency to form complexes and their stability increases with increasing atomic number.

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Similar Questions

This section contains questions each with two columns-I and II. Match the items given in column I with that in column II.

	Column I		Column II
a.	Ni	p.	Elements having same number of unpaired electron in their dispositive in column I
b.	Na	q.	At least 13 electrons are having magnetic quantum number 'zero'
c.	Mn	r.	Atom is paramagnetic
d.	Pd	s.	Element is not transition element
		t.	Element having pseudo inert gas configuration in its dispositive cation