Question

Which of the following shows correct order of bond length?

• A. \( \mathrm{O_2^+ > O_2 > O_2^- > O_2^{2-}} \)
• B. \( \mathrm{O_2^+ < O_2 < O_2^- < O_2^{2-}} \)
• C. \( \mathrm{O_2^+ < O_2^- < O_2 < O_2^{2-}} \)
• D. O₂⁺ > O₂ < O₂⁻ > O₂²-

Hint:

Higher bond order ⟹ shorter bond length.

Answer 1

The Correct Option is B

Bond length is inversely proportional to bond order. Bond order decreases in the order: O₂⁺ > O₂ > O₂⁻ > O₂²- Hence bond length increases in the reverse order.