Which of the following carboxylic acids will be the most acidic?
Correct answer: B. CH3CH2CCl2COOH
- A. CH3CHClCH2COOH
- B. CH3CH2CCl2COOH
- C. CH3CH2CHClCOOH
- D. CH3CH2CH2COOH
Explanation
The acidity of carboxylic acids increases with the presence of electron-withdrawing groups (like-CI) near the -COOH group. CH3CH2CCI2COOH has two chlorine atoms on the B-carbon, which strongly stabilize the carboxylate ion through the inductive effect. Fewer or more distant chlorines (as in the other options) make the acid less acidic.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Carboxylic Acids
550 free Carboxylic Acids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Carboxylic Acids questions
The addition of ethyl alcohol in protonated acetic acid is:
Which group of carboxylic acids is active for reaction with alkali metal carbonates?
CH3CN+ (H2O, H+)→ A+ (H2O, H+)→CH3COOH. Predict "A" among the following:
During the formation of an acid amide from ethanoic acid and ammonia, what actually happens:
Which pair can be used as a reactant for the preparation of acetyl chloride:
The work of conc.H2SO4 in esterification process is as: