Which one is the correct order of acidity?

Question

Canvas Classes · Accepted Answer

🧠 The Hybridization Acid Test
Acidity of hydrocarbons is all about how well the Carbon can handle a negative charge. More "-character" in the hybrid orbital means the electrons are closer to the nucleus, making the resulting carbanion more stable.

🗺️ The -Character Hierarchy
1.  (Ethyne):  hybridized (-character). Most acidic.
2.  (Propyne):  hybridized, but has a methyl group pushing electrons ( effect), which slightly destabilizes the conjugate base.
3.  (Ethene):  hybridized (-character).

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