Question

Which of the following statement is incorrect for group $15$ elements?

• A. Tendency to exhibit $-3$ oxidation state decreases down the group
• B. Tendency to exhibit $+3$ oxidation state increases down the group
• C. Tendency to exhibit $+5$ oxidation state increases down the group
• D. All of the above

Answer 1

The correct option is C Tendency to exhibit $+5$ oxidation state increases down the group

Common oxidation states of group $15$ elements are $-3,+3$ and $+5$.
Down the group tendency to show $-3$ oxidation state decreases for group $15$ elements due to increase in size and metallic character.
Down the group tendency to show $+3$ oxidation state increases and tendency to show $+5$ oxidation state decreases for group $15$ elements due to inert pair effect.
Hence, option (c) is the correct answer.