NEETChemistryp Block Elements (Group 13 & 14)
Give below are two statements: One is labelled as Assertion ( A ) and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T1 is ( Ga < In < ) T1. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:
Options
- A( A ) is true but ( R ) is false.
- B( A ) is false but ( R ) is true.
- CBoth ( A ) and ( R ) are true and ( R ) is the correct explanation of ( A ).
- DBoth ( A ) and ( R ) are true but ( R ) is NOT the correct explanation of ( A ).
Correct answer
C. Both ( A ) and ( R ) are true and ( R ) is the correct explanation of ( A ).
Step-by-step solution
The relative stability of +1 oxidation state progressively increases for heavier elements due to inert pair effect. Stability of A ⁺¹ < Ga ⁺¹ < In ⁺¹ < T ⁺¹