Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) NTA Abhiyas Question - P Block Elements Select the correct statement about elements …
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) NTA Abhiyas Question - P Block Elements Single Correct MCQ
Published on: August 12, 2026

Select the correct statement about elements of group 15th.

A
The order of stability of oxidation state for +3 is Bi 3+ > Sb 3+ > As 3+ and for +5 is Bi 5+ < Sb 5+ < As 5+
B
In the case of nitrogen, all oxidation states from +1 to +4 tend to disproportionate in acid solution.
C
There is considerable increase in covalent radius from N to P but from As to Bi only a small increase in covalent radius is observed.
D
All of these

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Text Solution

Verified by Experts
The correct answer is:
D

(i) This is due to the inert pair effect in the heavier p-block elements.

(ii) 3HNO 2 HNO 3 + H 2 O + 2NO

(iii) This is due to the presence of completely filled d and 1 or f orbitals in heavier elements. Covalent radius 1 pm; N = 70, P = 110, As = 120, Bi = 150.

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