Question

Group 13 elements show + 1 and + 3 oxidation states. Relative stability of + 3 oxidation state may be given as

A. $$T{l^{3 + }} > I{n^{3 + }} > G{a^{3 + }} > A{l^{3 + }} > {B^{3 + }}$$
B. $${B^{3 + }} > A{l^{3 + }} > G{a^{3 + }} > I{n^{3 + }} > T{l^{3 + }}$$  
C. $$A{l^{3 + }} > G{a^{3 + }} > T{l^{3 + }} > I{n^{3 + }} > {B^{3 + }}$$
D. $$A{l^{3 + }} > {B^{3 + }} > G{a^{3 + }} > T{l^{3 + }} > I{n^{3 + }}$$
Answer :   $${B^{3 + }} > A{l^{3 + }} > G{a^{3 + }} > I{n^{3 + }} > T{l^{3 + }}$$
Solution :
Stability of + 3 oxidation state decreases from $$Al$$  to $$Tl.$$  $$B$$ always shows + 3 oxidation state in all of its compounds.

Releted MCQ Question on
Inorganic Chemistry >> P - Block Elements

Releted Question 1

The reddish brown coloured gas formed when nitric oxide is oxidised by air is

A. $${N_2}{O_5}$$
B. $${N_2}{O_4}$$
C. $$N{O_2}$$
D. $${N_2}{O_3}$$
Releted Question 2

The temporary hardness of water due to calcium carbonate can be removed by adding —

A. $$CaC{O_3}$$
B. $$Ca{\left( {OH} \right)_2}\,$$
C. $$CaC{l_2}$$
D. $$\,HCl$$
Releted Question 3

Which of the following is most stable to heat

A. $$HCl$$
B. $$HOCl$$
C. $$HBr$$
D. $$HI$$
Releted Question 4

White $$P$$ reacts with caustic soda. The products are $$P{H_3}$$ and $$Na{H_2}P{O_2}.$$   This reaction is an example of

A. Oxidation
B. Reduction
C. oxidation and reduction
D. Neutralisation

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P - Block Elements


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