First slide

Atomic and physical properties

Question

13th group elements show +1 and +3 oxidation states. 14th group elements show +2 and +4 oxidation states. Correct order about the stability of their oxidation states is

Easy

A

${Sn}^{+ 4} > {Sn}^{+ 2}$
B

${Pb}^{+ 4} > {Pb}^{+ 2}$
C

${Al}^{+} > {Al}^{+ 3}$
D

${Tl}^{+ 3} > {Tl}^{+}$

Solution

In 13th group, stability of +3> +1 …except in Thallium ;
In 14th group stability of +4>+2….except in Lead ;
Thallium due to inert pair effect is more stable in “+1” state;
Tl and Pb show inert pair effect. They are stable in their lower oxidation state;
Other than Tl and Pb remaining elements are stable in their group number oxidation state ;

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