JEE Main2011ChemistryGeneral Organic ChemistryActual

The strongest acid amongst the following compounds is :

Options

AHCOOH
BCH ₃ CH ₂ CH ( Cl ) CO ₂ H
CClCH ₂ CH ₂ CH ₂ COOH
DCH ₃ COOH

Correct answer

B. CH ₃ CH ₂ CH ( Cl ) CO ₂ H

Step-by-step solution

Electron releasing groups (Alkyl groups) de stabilizes conjugate base. The + I effect of C ₃ H ₇ is less than -1 effect of Cl K _ a of HCOOH is 17.9 10⁻⁵ K _ a of CH ₃ CH ₂ Cl CH - COOH is 139 10⁻⁵

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