Multiple choice The ratio of σ- and π-bonds in carbon suboxide is 2 : 3 2 : 1 1 : 2 3 : 2 1 : 1 Reveal answer Fill a bubble to check yourself E Correct answer Explanation O=C=C=C=O (carbon suboxide) Number of σ-bonds = 4 Number of π-bonds = 4 So that the ratio of σ- and π-bonds in carbon suboxide is 4 : 4 or 1 : 1. Thus, this option is correct.