Questions

Which of the following statement is not correct?

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La(OH)3 is less basic than Lu(OH)3

In lanthanide series ionic radius of Ln3+ * ions decreases

La is actually an element of transition series rather than lanthanide series

Atomic radii of Zr and Hf are same because of lanthanide contraction

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detailed solution

Correct option is A

La(OH )3 is more basic than Lu(OH)3. This is because ionicsize of La3+ on is more than La3+ ion (Fajan's rule).

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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