Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 23

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The radius of ${La}^{3 +}$ (Atomic number of $La = 57$ ) is $1.06$ Angstrom. Which one of the following given values will be closest to the radius of ${Lu}^{3 +}$ (Atomic number of $Lu = 71$ )?

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Important Questions on The d- and f-Block Elements

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 24

The highest value of the calculated spin-only magnetic moment (in

BM

) among all the transition metal complexes is:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 25

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In the above sequence of reactions, $A$ and $D$ , respectively, are:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 26

The pair of metal ions that can give a spin-only magnetic moment of

3.9 BM

for the complex

[M {(H_{2} O)}_{6}] {Cl}_{2}

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 27

The soldiers of the Napoleon army while at the Alps during freezing winter suffered a serious problem as regards the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 28

The "spin-only" magnetic moment [in units of Bohr magneton, [

μ

] of

{Ni}^{2 +}

in an aqueous solution would be

(Atomic number of Ni = 28)

:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 29

Which of the following factors may be regarded as the main cause of lanthanoid contraction?

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 30

The Lanthanoid contraction is responsible for the fact that:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 4>Q 31

Lanthanoid contraction is caused due to: