Determine the hybridization states of the carbon atoms in but-1-en-3-yne () from left to right. — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Numbering starts from the double bond (priority). C1 and C2 are doubly bonded, thus $sp^2$ hybridized. C3 and C4 are triply bonded, thus $sp$ hybridized.