Question

Select the correct statement about elements of group 15:

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

Answer 1

Answer: (C)

As we move down the group, lower oxidation state become stable due to inert pair effect.