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Amino Acids

Which one of ...

Question

Which one of the following is the strongest acid ?

A

Cl₂CH COOH

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B

ClCH₂ COOH

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C

Cl₃CCOOH

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D

CH₃ COOH

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Solution

The correct option is A
Cl₂CH COOH

Cl₃CCOOH

Cl shows -I effect and thus stabilize the negative charge on carboxylate anion.

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Similar questions

Q. Name the reagents used in the following reactions:

(i) C H_{3} - C O - C H_{3} ? \to C H_{3} - C H_{3} | C | O H - C H_{3}

(i i) C H_{3} - C O O H ? \to C l C H_{2} - C O O H

Q. Which is the stronger acid in each of the following pairs?
(i)

C H_{3} - C O O H

C H_{2} = C H - C O O H

C_{6} H_{5} - C O O H

C_{6} H_{5} - C H_{2} - C O O H

C H_{3} - C H_{2} - C O O H

C H_{3} - C H | O H - C O O H

C H_{3} - C H_{2} - C O O H + B r_{2} P B r_{3} - -- \to C H_{3} - C | B r H - C O O H

H_{2} O, C H_{3} N H_{2} - -------- \to

C H_{3} - C | N H_{2} H - C O O H

The following sequence of reaction affords :

Q. The increasing order of acidic strength in the following acids.

C l C H_{2} C O O H, C H_{3} C H_{2} C O O H, C l C H_{2} C H_{3} C O O H, (C H_{3})_{2} C H C O O H

C H_{3} C O O H

H - C O O H > P h - C O O H > C H_{3} - C O O H

(acidic nature)

C F_{3} - C O O H > C C I_{3} - C O O H > C H_{2} - C O O H

(Acidic nature)

N - m e t h y l m e t h a n a m i n e > m e t h a n a m i n e > N, N - d i m e t h y l m e t h a n a m i n e

(Basic nature in aqueous phase)

N, N - d i e t h l e t h a n a m i n e > N - e t h y l e t h a n a m i n e > E t h a n a m i n e

(Basic nature in aqueous phase)Then the correct order is:

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