Question

Could an insect walk on a liquid such as rubbing alcohol which has a smaller attraction between molecules than water?

Answer 1

Probably not. A better question is whether you could swim in ethanol.

Explanation:

Given that the density of ethanol is `0.79*g*mL^-1`, which is lower than the aqueous density of organisms, you would sink like a stone. Insects also use the large surface tension of water for their locomotion; alcohols do not have these large surface tensions.