Question

The range of oxidation states exhibited by most elements in group V of the periodic table (N.P. As Sb. Bi) is

• A. -3 to +1
• B. -3 to +3
• C. -3 to +5
• D. -2 to +3
• E. +1 to +5

Answer 1

Answer: (C)

-3 to +5

Common oxidation state of group $5$ elements are $-3,+3$ and $+5$.

Nitrogen shows $+1,+2,+4$ oxidation state. All oxidation state from $+1$ to $+4$ disproportionate in acid solution in case of nitrogen. Phosphorous shows $+1$ and $+4$ oxidation states in some oxoacids. All intermediate oxidation state disproportionate in acid and alkali into $-3$ and $+5$. However, $+3$ oxidation state for $Ar,Sb,Bi$ become increasingly stable with respect to disproportionation.