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The atomic radii of 4d series are larger than those of 3d series

The atomic radii of 4d and 5d series are almost same.

Stability of the M3+ ions in aqueous solution is:Sc3+ >cr3+>Fe3+>Co3+

Basic strength of the hydroxides is:La(OH)3

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detailed solution

Correct option is D

Correct (a) La(OH)3>Y(OH)3>Sc(OH)3Size of La3+ > Y3+ > Sc3+According to Fajan's rule: Large cation & small anion, more ionic character and more basic. Hence the basic strength order is:La(OH)3 > Y(OH)3, Sc(OH)3

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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