Which among the following have least pH?
Correct answer: C. CH3CHCI2COOH
- A. CH3CH2COOH
- B. CH2CICH2COOH
- C. CH3CHCI2COOH
- D. CH3CH2CH2COOH
Explanation
The compound with the least pH (highest acidity) is CH3-CH-Cl2-COOH (2,2-dichloropropanoic acid) due to the presence of two chlorine atoms, which significantly enhances its electron-withdrawing effect and acidity.
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About Carboxylic Acids
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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