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

323530 In the reaction
\({\text{C}}{{\text{H}}_3}{\text{CHO}} + {\text{HCN}} \to {\text{C}}{{\text{H}}_3}{\text{CH}}({\text{OH}}){\text{CN}}\xrightarrow{{{{\text{H}}_2}{\text{O}}}}\)
\(\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{COOH}\)
an asymmetric center is generated. The acid obtained will be

1 d-isomer
2 \(l\)-isomer
3 \(50 \% \mathrm{~d}\) and \({\rm{50\% }}\,\,{\rm{l}}\)-isomer
4 \(20 \% \mathrm{~d}\) and \({\rm{80\% }}\,\,{\rm{l}}\)-isomer
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323531 Which of the following statement is incorrect about the reaction of ammonia derivatives with carbonyl compounds?

1 At very high \(\mathrm{pH}\) reaction becomes explosive.
2 \(\mathrm{pH}\) of solution is maintained between 3 to 4.
3 Addition of ammonia derivatives occurs followed by elimination of \(\mathrm{H}_{2} \mathrm{O}\).
4 At very low \(\mathrm{pH}( < 3)\) ammonia derivates are protonated and do not act as nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323532 Assertion :
Carbonyl compounds undergo nucleophilic addition reactions
Reason :
Addition of \(\mathrm{KCN}\) solution to carbonyl compounds decreases the \(\mathrm{pH}\) of 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

323533 Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:

1 Sec. butyl alcohol
2 Tert.butyl alccohol
3 Isobutyl alcohol
4 Isopropyl alcohol
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323530 In the reaction
\({\text{C}}{{\text{H}}_3}{\text{CHO}} + {\text{HCN}} \to {\text{C}}{{\text{H}}_3}{\text{CH}}({\text{OH}}){\text{CN}}\xrightarrow{{{{\text{H}}_2}{\text{O}}}}\)
\(\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{COOH}\)
an asymmetric center is generated. The acid obtained will be

1 d-isomer
2 \(l\)-isomer
3 \(50 \% \mathrm{~d}\) and \({\rm{50\% }}\,\,{\rm{l}}\)-isomer
4 \(20 \% \mathrm{~d}\) and \({\rm{80\% }}\,\,{\rm{l}}\)-isomer
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323531 Which of the following statement is incorrect about the reaction of ammonia derivatives with carbonyl compounds?

1 At very high \(\mathrm{pH}\) reaction becomes explosive.
2 \(\mathrm{pH}\) of solution is maintained between 3 to 4.
3 Addition of ammonia derivatives occurs followed by elimination of \(\mathrm{H}_{2} \mathrm{O}\).
4 At very low \(\mathrm{pH}( < 3)\) ammonia derivates are protonated and do not act as nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323532 Assertion :
Carbonyl compounds undergo nucleophilic addition reactions
Reason :
Addition of \(\mathrm{KCN}\) solution to carbonyl compounds decreases the \(\mathrm{pH}\) of 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

323533 Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:

1 Sec. butyl alcohol
2 Tert.butyl alccohol
3 Isobutyl alcohol
4 Isopropyl alcohol
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323530 In the reaction
\({\text{C}}{{\text{H}}_3}{\text{CHO}} + {\text{HCN}} \to {\text{C}}{{\text{H}}_3}{\text{CH}}({\text{OH}}){\text{CN}}\xrightarrow{{{{\text{H}}_2}{\text{O}}}}\)
\(\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{COOH}\)
an asymmetric center is generated. The acid obtained will be

1 d-isomer
2 \(l\)-isomer
3 \(50 \% \mathrm{~d}\) and \({\rm{50\% }}\,\,{\rm{l}}\)-isomer
4 \(20 \% \mathrm{~d}\) and \({\rm{80\% }}\,\,{\rm{l}}\)-isomer
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323531 Which of the following statement is incorrect about the reaction of ammonia derivatives with carbonyl compounds?

1 At very high \(\mathrm{pH}\) reaction becomes explosive.
2 \(\mathrm{pH}\) of solution is maintained between 3 to 4.
3 Addition of ammonia derivatives occurs followed by elimination of \(\mathrm{H}_{2} \mathrm{O}\).
4 At very low \(\mathrm{pH}( < 3)\) ammonia derivates are protonated and do not act as nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323532 Assertion :
Carbonyl compounds undergo nucleophilic addition reactions
Reason :
Addition of \(\mathrm{KCN}\) solution to carbonyl compounds decreases the \(\mathrm{pH}\) of 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

323533 Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:

1 Sec. butyl alcohol
2 Tert.butyl alccohol
3 Isobutyl alcohol
4 Isopropyl alcohol
NEET - 2020
NEET DIGITAL LIBRARY
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323530 In the reaction
\({\text{C}}{{\text{H}}_3}{\text{CHO}} + {\text{HCN}} \to {\text{C}}{{\text{H}}_3}{\text{CH}}({\text{OH}}){\text{CN}}\xrightarrow{{{{\text{H}}_2}{\text{O}}}}\)
\(\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{COOH}\)
an asymmetric center is generated. The acid obtained will be

1 d-isomer
2 \(l\)-isomer
3 \(50 \% \mathrm{~d}\) and \({\rm{50\% }}\,\,{\rm{l}}\)-isomer
4 \(20 \% \mathrm{~d}\) and \({\rm{80\% }}\,\,{\rm{l}}\)-isomer
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323531 Which of the following statement is incorrect about the reaction of ammonia derivatives with carbonyl compounds?

1 At very high \(\mathrm{pH}\) reaction becomes explosive.
2 \(\mathrm{pH}\) of solution is maintained between 3 to 4.
3 Addition of ammonia derivatives occurs followed by elimination of \(\mathrm{H}_{2} \mathrm{O}\).
4 At very low \(\mathrm{pH}( < 3)\) ammonia derivates are protonated and do not act as nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323532 Assertion :
Carbonyl compounds undergo nucleophilic addition reactions
Reason :
Addition of \(\mathrm{KCN}\) solution to carbonyl compounds decreases the \(\mathrm{pH}\) of 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

323533 Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:

1 Sec. butyl alcohol
2 Tert.butyl alccohol
3 Isobutyl alcohol
4 Isopropyl alcohol
NEET - 2020
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