Chemical Reactions of Aldehydes and Ketones
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323663 A substance \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}\) does not react with Fehling's solution but gives positive reactions for a carbonyl group. It also gives positive iodoform reaction. Which of the following structure will best correspond to the above statements?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{COCH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}\left(\mathrm{CH}_{3}\right)_{2}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CHO}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323664 In the reduction of acetaldehyde using \({\rm{LiAl}}{{\rm{H}}_{\rm{4}}}\) the hydride ion acts as

1 an electrophile
2 a nucleophile
3 both (1) and (2)
4 a free radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323665 Assertion :
Aldehydes and ketones, both react with Tollen's reagent to form silver mirror.
Reason :
Both, aldehydes and ketones contain a carbonyl group.

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

323666 Which of the following reagent is used to identify carbonyl group from other functional groups?

1 Schiff's reagent
2 Fehling solution
3 2, 4-dinitro phenyl hydrazine
4 Tollen's reagent
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323663 A substance \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}\) does not react with Fehling's solution but gives positive reactions for a carbonyl group. It also gives positive iodoform reaction. Which of the following structure will best correspond to the above statements?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{COCH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}\left(\mathrm{CH}_{3}\right)_{2}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CHO}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323664 In the reduction of acetaldehyde using \({\rm{LiAl}}{{\rm{H}}_{\rm{4}}}\) the hydride ion acts as

1 an electrophile
2 a nucleophile
3 both (1) and (2)
4 a free radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323665 Assertion :
Aldehydes and ketones, both react with Tollen's reagent to form silver mirror.
Reason :
Both, aldehydes and ketones contain a carbonyl group.

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

323666 Which of the following reagent is used to identify carbonyl group from other functional groups?

1 Schiff's reagent
2 Fehling solution
3 2, 4-dinitro phenyl hydrazine
4 Tollen's reagent
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323663 A substance \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}\) does not react with Fehling's solution but gives positive reactions for a carbonyl group. It also gives positive iodoform reaction. Which of the following structure will best correspond to the above statements?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{COCH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}\left(\mathrm{CH}_{3}\right)_{2}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CHO}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323664 In the reduction of acetaldehyde using \({\rm{LiAl}}{{\rm{H}}_{\rm{4}}}\) the hydride ion acts as

1 an electrophile
2 a nucleophile
3 both (1) and (2)
4 a free radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323665 Assertion :
Aldehydes and ketones, both react with Tollen's reagent to form silver mirror.
Reason :
Both, aldehydes and ketones contain a carbonyl group.

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

323666 Which of the following reagent is used to identify carbonyl group from other functional groups?

1 Schiff's reagent
2 Fehling solution
3 2, 4-dinitro phenyl hydrazine
4 Tollen's reagent
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323663 A substance \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}\) does not react with Fehling's solution but gives positive reactions for a carbonyl group. It also gives positive iodoform reaction. Which of the following structure will best correspond to the above statements?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{COCH}_{3}\)
2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}\left(\mathrm{CH}_{3}\right)_{2}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CHO}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323664 In the reduction of acetaldehyde using \({\rm{LiAl}}{{\rm{H}}_{\rm{4}}}\) the hydride ion acts as

1 an electrophile
2 a nucleophile
3 both (1) and (2)
4 a free radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323665 Assertion :
Aldehydes and ketones, both react with Tollen's reagent to form silver mirror.
Reason :
Both, aldehydes and ketones contain a carbonyl group.

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

323666 Which of the following reagent is used to identify carbonyl group from other functional groups?

1 Schiff's reagent
2 Fehling solution
3 2, 4-dinitro phenyl hydrazine
4 Tollen's reagent
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