Determine the most acidic hydrocarbon from the following options based on the stability of its conju — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Acidic strength is proportional to the s-character of the carbon holding the proton. Ethyne is $sp$ hybridized (50% s-character). Its conjugate base ($HC \equiv C^-$) holds the negative charge closer to the nucleus, making it vastly more stable and acidic than $sp^2$ or $sp^3$ hydrocarbons.