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Which of the following statement is not correct?

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a
La(OH)3  is  less basic than   Lu(OH)3
b
In lanthanide series ionic radius of Ln3+ * ions decreases
c
La is actually an element of transition series rather than lanthanide series
d
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.Nip.Elements having same number
of unpaired electron in their
dispositive in column I
b.Naq.At least 13 electrons are having
magnetic quantum number 'zero'
c.Mnr.Atom is paramagnetic
d.Pds.Element is not transition element
  t.Element having pseudo inert gas
configuration in its dispositive cation
 


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