Chemical Reactions of Carboxylic Acids
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323692 Acetic acid on warming with hydrazoic acid in presence of conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives:

1 \(\mathrm{CH}_{3} \mathrm{CONH}_{2}\)
2 \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)
3 \(\mathrm{CH}_{3} \mathrm{COONH}_{4}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323693 Assertion :
Higher the dissociation constant of acid more is acidic character.
Reason :
The second dissociation constant of maleic acid is greater than fumaric acid.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323694 Consider the following acids :
(i) \(\mathrm{F}_{3} \mathrm{C}-\mathrm{COOH}\) (ii) \(\mathrm{CH}_{3} \mathrm{COOH}\)
(iii) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\) (iv) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)
Correct order of \(\mathrm{pK}_{\mathrm{a}}\) values is

1 (i) \(>\) (iii) \(>\) (ii) \(>\) (iv)
2 (iv) \(>\) (ii) \(>\) (iii) \(>\) (i)
3 (iv) \(>\) (iii) \(>\) (ii) \(>\) (i)
4 (i) \(>\) (ii) \(>\) (iv) \(>\) (iii)
AIIMS - 2019
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323695 The acidic nature of carboxylic acids \({\rm{RCOOH}} \to {\rm{RCO}}{{\rm{O}}^{\rm{ - }}} + {{\rm{H}}^{\rm{ + }}}\) is due to

1 high degree of ionisation of carboxylic acids
2 greater resonance stabilisation of the carboxylic acid over the carboxylate ion
3 greater resonance stabilisation of the carboxylate ion over carboxylic acid
4 solubility of carboxylic acids in water
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323692 Acetic acid on warming with hydrazoic acid in presence of conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives:

1 \(\mathrm{CH}_{3} \mathrm{CONH}_{2}\)
2 \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)
3 \(\mathrm{CH}_{3} \mathrm{COONH}_{4}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323693 Assertion :
Higher the dissociation constant of acid more is acidic character.
Reason :
The second dissociation constant of maleic acid is greater than fumaric acid.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323694 Consider the following acids :
(i) \(\mathrm{F}_{3} \mathrm{C}-\mathrm{COOH}\) (ii) \(\mathrm{CH}_{3} \mathrm{COOH}\)
(iii) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\) (iv) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)
Correct order of \(\mathrm{pK}_{\mathrm{a}}\) values is

1 (i) \(>\) (iii) \(>\) (ii) \(>\) (iv)
2 (iv) \(>\) (ii) \(>\) (iii) \(>\) (i)
3 (iv) \(>\) (iii) \(>\) (ii) \(>\) (i)
4 (i) \(>\) (ii) \(>\) (iv) \(>\) (iii)
AIIMS - 2019
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323695 The acidic nature of carboxylic acids \({\rm{RCOOH}} \to {\rm{RCO}}{{\rm{O}}^{\rm{ - }}} + {{\rm{H}}^{\rm{ + }}}\) is due to

1 high degree of ionisation of carboxylic acids
2 greater resonance stabilisation of the carboxylic acid over the carboxylate ion
3 greater resonance stabilisation of the carboxylate ion over carboxylic acid
4 solubility of carboxylic acids in water
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323692 Acetic acid on warming with hydrazoic acid in presence of conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives:

1 \(\mathrm{CH}_{3} \mathrm{CONH}_{2}\)
2 \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)
3 \(\mathrm{CH}_{3} \mathrm{COONH}_{4}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323693 Assertion :
Higher the dissociation constant of acid more is acidic character.
Reason :
The second dissociation constant of maleic acid is greater than fumaric acid.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323694 Consider the following acids :
(i) \(\mathrm{F}_{3} \mathrm{C}-\mathrm{COOH}\) (ii) \(\mathrm{CH}_{3} \mathrm{COOH}\)
(iii) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\) (iv) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)
Correct order of \(\mathrm{pK}_{\mathrm{a}}\) values is

1 (i) \(>\) (iii) \(>\) (ii) \(>\) (iv)
2 (iv) \(>\) (ii) \(>\) (iii) \(>\) (i)
3 (iv) \(>\) (iii) \(>\) (ii) \(>\) (i)
4 (i) \(>\) (ii) \(>\) (iv) \(>\) (iii)
AIIMS - 2019
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323695 The acidic nature of carboxylic acids \({\rm{RCOOH}} \to {\rm{RCO}}{{\rm{O}}^{\rm{ - }}} + {{\rm{H}}^{\rm{ + }}}\) is due to

1 high degree of ionisation of carboxylic acids
2 greater resonance stabilisation of the carboxylic acid over the carboxylate ion
3 greater resonance stabilisation of the carboxylate ion over carboxylic acid
4 solubility of carboxylic acids in water
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323692 Acetic acid on warming with hydrazoic acid in presence of conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives:

1 \(\mathrm{CH}_{3} \mathrm{CONH}_{2}\)
2 \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)
3 \(\mathrm{CH}_{3} \mathrm{COONH}_{4}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323693 Assertion :
Higher the dissociation constant of acid more is acidic character.
Reason :
The second dissociation constant of maleic acid is greater than fumaric acid.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323694 Consider the following acids :
(i) \(\mathrm{F}_{3} \mathrm{C}-\mathrm{COOH}\) (ii) \(\mathrm{CH}_{3} \mathrm{COOH}\)
(iii) \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\) (iv) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)
Correct order of \(\mathrm{pK}_{\mathrm{a}}\) values is

1 (i) \(>\) (iii) \(>\) (ii) \(>\) (iv)
2 (iv) \(>\) (ii) \(>\) (iii) \(>\) (i)
3 (iv) \(>\) (iii) \(>\) (ii) \(>\) (i)
4 (i) \(>\) (ii) \(>\) (iv) \(>\) (iii)
AIIMS - 2019
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323695 The acidic nature of carboxylic acids \({\rm{RCOOH}} \to {\rm{RCO}}{{\rm{O}}^{\rm{ - }}} + {{\rm{H}}^{\rm{ + }}}\) is due to

1 high degree of ionisation of carboxylic acids
2 greater resonance stabilisation of the carboxylic acid over the carboxylate ion
3 greater resonance stabilisation of the carboxylate ion over carboxylic acid
4 solubility of carboxylic acids in water