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

323676 Assertion :
Fehling's solution can be used to distinguish benzaldehyde from acetaldehyde.
Reason :
The \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in benzaldehyde is stronger than \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in acetaldehyde.

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

323677 Compound (A), \(\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}\), forms a
phenylhydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) would be

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

323678 Assertion :
Benzaldehyde forms black precipitate or silver mirror with Tollen's reagent.
Reason :
Benzaldehyde gives a positive test with Benedict's and Fehling solution.

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

323679 How many of the following compounds will NOT reduce Fehling's solution?
\({\mathrm{\mathrm{HCHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COC}_{6} \mathrm{H}_{5}}}\), \({\mathrm{\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{CHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}, \quad \mathrm{CH}_{3} \mathrm{CHO}}}\), \({\mathrm{\mathrm{m}-\mathrm{HOC}_{6} \mathrm{H}_{4} \mathrm{CHO}, \mathrm{p}-\mathrm{O}_{2} \mathrm{NC}_{6} \mathrm{H}_{4} \mathrm{CHO}}}\).

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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323676 Assertion :
Fehling's solution can be used to distinguish benzaldehyde from acetaldehyde.
Reason :
The \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in benzaldehyde is stronger than \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in acetaldehyde.

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

323677 Compound (A), \(\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}\), forms a
phenylhydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) would be

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

323678 Assertion :
Benzaldehyde forms black precipitate or silver mirror with Tollen's reagent.
Reason :
Benzaldehyde gives a positive test with Benedict's and Fehling solution.

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

323679 How many of the following compounds will NOT reduce Fehling's solution?
\({\mathrm{\mathrm{HCHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COC}_{6} \mathrm{H}_{5}}}\), \({\mathrm{\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{CHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}, \quad \mathrm{CH}_{3} \mathrm{CHO}}}\), \({\mathrm{\mathrm{m}-\mathrm{HOC}_{6} \mathrm{H}_{4} \mathrm{CHO}, \mathrm{p}-\mathrm{O}_{2} \mathrm{NC}_{6} \mathrm{H}_{4} \mathrm{CHO}}}\).

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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323676 Assertion :
Fehling's solution can be used to distinguish benzaldehyde from acetaldehyde.
Reason :
The \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in benzaldehyde is stronger than \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in acetaldehyde.

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

323677 Compound (A), \(\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}\), forms a
phenylhydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) would be

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

323678 Assertion :
Benzaldehyde forms black precipitate or silver mirror with Tollen's reagent.
Reason :
Benzaldehyde gives a positive test with Benedict's and Fehling solution.

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

323679 How many of the following compounds will NOT reduce Fehling's solution?
\({\mathrm{\mathrm{HCHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COC}_{6} \mathrm{H}_{5}}}\), \({\mathrm{\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{CHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}, \quad \mathrm{CH}_{3} \mathrm{CHO}}}\), \({\mathrm{\mathrm{m}-\mathrm{HOC}_{6} \mathrm{H}_{4} \mathrm{CHO}, \mathrm{p}-\mathrm{O}_{2} \mathrm{NC}_{6} \mathrm{H}_{4} \mathrm{CHO}}}\).

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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323676 Assertion :
Fehling's solution can be used to distinguish benzaldehyde from acetaldehyde.
Reason :
The \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in benzaldehyde is stronger than \(\mathrm{C}-\mathrm{H}\) bond of \(\mathrm{CHO}\) group in acetaldehyde.

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

323677 Compound (A), \(\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}\), forms a
phenylhydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) would be

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

323678 Assertion :
Benzaldehyde forms black precipitate or silver mirror with Tollen's reagent.
Reason :
Benzaldehyde gives a positive test with Benedict's and Fehling solution.

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

323679 How many of the following compounds will NOT reduce Fehling's solution?
\({\mathrm{\mathrm{HCHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COC}_{6} \mathrm{H}_{5}}}\), \({\mathrm{\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{CHO}, \quad \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}, \quad \mathrm{CH}_{3} \mathrm{CHO}}}\), \({\mathrm{\mathrm{m}-\mathrm{HOC}_{6} \mathrm{H}_{4} \mathrm{CHO}, \mathrm{p}-\mathrm{O}_{2} \mathrm{NC}_{6} \mathrm{H}_{4} \mathrm{CHO}}}\).

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