NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323487
Identify the correct statements about cannizaro reaction
1 It is a typical reaction of aliphatic aldehyde
2 It is a reaction answered by only aldehydes containing \(\alpha\)-hydrogen
3 It is a reaction answered only by aromatic aldehyde
4 It is a reaction answered by aldehydes containing no \(\alpha\)-Hydrogens.
Explanation:
Aldehydes, which do not contain an \(\alpha\)-hydrogen atom undergoes Cannizzaro reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323488
Which of the following is the correct sequence of step involved in the mechanism of Cannizzaro reaction?
1 Nucleophilic attack, transfer of \(\mathrm{H}^{-}\)and transfer of \(\mathrm{H}^{+}\)
2 Transfer of \(\mathrm{H}^{-}\), transfer of \(\mathrm{H}^{+}\)and nucleophilic attack
3 Transfer of \(\mathrm{H}^{+}\), nucleophilic attack and transfer of \(\mathrm{H}^{-}\)
4 Electrophilic attack by \(\mathrm{OH}^{-}\), transfer of \(\mathrm{H}^{+}\)and transfer of \(\mathrm{H}^{-}\)
Explanation:
Consider the following Cannizzaro reaction, The mechanism of Cannizzaro reaction is as Step I Attack of nucleophile \(\left(\mathrm{OH}^{-}\right)\)to the carbonyl carbon. Step II The transfer of hydride ion from anion (I) to second molecule of aldehyde and finally rapid transfer of proton takes place.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323489
In Cannizzaro reaction given below \({\text{2PhCHO}}\xrightarrow{{{\text{O}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{PhC}}{{\text{H}}_{\text{2}}}{\text{OH + PhCO}}_{\text{2}}^{{\text{ - 1}}}\) the slowest step is
1 The deprotonation of \(\mathrm{PhCH}_{2} \mathrm{OH}\)
2 The attack of \({\rm{O}}{{\rm{H}}^{\rm{\Theta }}}\) at the carboxyl group
3 The transfer of hydride to the carbonyl group
4 The abstraction of proton from the carboxylic group
Explanation:
In cannizaro reaction, the transfer of \(\mathrm{H}^{-}\) to a carbonyl group is the slowest step of the reaction; hence it is the rate-determining step of the reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323490
Cannizzaro reaction is an example of
1 Elimination reaction
2 Disproportionation reaction
3 Decomposition reaction
4 Nucleophilic addition reaction
Explanation:
In Cannizzaro reaction, one molecule of an aldehyde is reduced to alcohol and at the same time second molecule is oxidized to carboxylic acid salt. This is an example of disproportionation reaction. \({\text{2HCHO}}\xrightarrow{{{\text{50 % KOH}}}}{\text{HCOOK + C}}{{\text{H}}_{\text{3}}}{\text{OH}}\)
323487
Identify the correct statements about cannizaro reaction
1 It is a typical reaction of aliphatic aldehyde
2 It is a reaction answered by only aldehydes containing \(\alpha\)-hydrogen
3 It is a reaction answered only by aromatic aldehyde
4 It is a reaction answered by aldehydes containing no \(\alpha\)-Hydrogens.
Explanation:
Aldehydes, which do not contain an \(\alpha\)-hydrogen atom undergoes Cannizzaro reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323488
Which of the following is the correct sequence of step involved in the mechanism of Cannizzaro reaction?
1 Nucleophilic attack, transfer of \(\mathrm{H}^{-}\)and transfer of \(\mathrm{H}^{+}\)
2 Transfer of \(\mathrm{H}^{-}\), transfer of \(\mathrm{H}^{+}\)and nucleophilic attack
3 Transfer of \(\mathrm{H}^{+}\), nucleophilic attack and transfer of \(\mathrm{H}^{-}\)
4 Electrophilic attack by \(\mathrm{OH}^{-}\), transfer of \(\mathrm{H}^{+}\)and transfer of \(\mathrm{H}^{-}\)
Explanation:
Consider the following Cannizzaro reaction, The mechanism of Cannizzaro reaction is as Step I Attack of nucleophile \(\left(\mathrm{OH}^{-}\right)\)to the carbonyl carbon. Step II The transfer of hydride ion from anion (I) to second molecule of aldehyde and finally rapid transfer of proton takes place.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323489
In Cannizzaro reaction given below \({\text{2PhCHO}}\xrightarrow{{{\text{O}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{PhC}}{{\text{H}}_{\text{2}}}{\text{OH + PhCO}}_{\text{2}}^{{\text{ - 1}}}\) the slowest step is
1 The deprotonation of \(\mathrm{PhCH}_{2} \mathrm{OH}\)
2 The attack of \({\rm{O}}{{\rm{H}}^{\rm{\Theta }}}\) at the carboxyl group
3 The transfer of hydride to the carbonyl group
4 The abstraction of proton from the carboxylic group
Explanation:
In cannizaro reaction, the transfer of \(\mathrm{H}^{-}\) to a carbonyl group is the slowest step of the reaction; hence it is the rate-determining step of the reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323490
Cannizzaro reaction is an example of
1 Elimination reaction
2 Disproportionation reaction
3 Decomposition reaction
4 Nucleophilic addition reaction
Explanation:
In Cannizzaro reaction, one molecule of an aldehyde is reduced to alcohol and at the same time second molecule is oxidized to carboxylic acid salt. This is an example of disproportionation reaction. \({\text{2HCHO}}\xrightarrow{{{\text{50 % KOH}}}}{\text{HCOOK + C}}{{\text{H}}_{\text{3}}}{\text{OH}}\)
323487
Identify the correct statements about cannizaro reaction
1 It is a typical reaction of aliphatic aldehyde
2 It is a reaction answered by only aldehydes containing \(\alpha\)-hydrogen
3 It is a reaction answered only by aromatic aldehyde
4 It is a reaction answered by aldehydes containing no \(\alpha\)-Hydrogens.
Explanation:
Aldehydes, which do not contain an \(\alpha\)-hydrogen atom undergoes Cannizzaro reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323488
Which of the following is the correct sequence of step involved in the mechanism of Cannizzaro reaction?
1 Nucleophilic attack, transfer of \(\mathrm{H}^{-}\)and transfer of \(\mathrm{H}^{+}\)
2 Transfer of \(\mathrm{H}^{-}\), transfer of \(\mathrm{H}^{+}\)and nucleophilic attack
3 Transfer of \(\mathrm{H}^{+}\), nucleophilic attack and transfer of \(\mathrm{H}^{-}\)
4 Electrophilic attack by \(\mathrm{OH}^{-}\), transfer of \(\mathrm{H}^{+}\)and transfer of \(\mathrm{H}^{-}\)
Explanation:
Consider the following Cannizzaro reaction, The mechanism of Cannizzaro reaction is as Step I Attack of nucleophile \(\left(\mathrm{OH}^{-}\right)\)to the carbonyl carbon. Step II The transfer of hydride ion from anion (I) to second molecule of aldehyde and finally rapid transfer of proton takes place.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323489
In Cannizzaro reaction given below \({\text{2PhCHO}}\xrightarrow{{{\text{O}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{PhC}}{{\text{H}}_{\text{2}}}{\text{OH + PhCO}}_{\text{2}}^{{\text{ - 1}}}\) the slowest step is
1 The deprotonation of \(\mathrm{PhCH}_{2} \mathrm{OH}\)
2 The attack of \({\rm{O}}{{\rm{H}}^{\rm{\Theta }}}\) at the carboxyl group
3 The transfer of hydride to the carbonyl group
4 The abstraction of proton from the carboxylic group
Explanation:
In cannizaro reaction, the transfer of \(\mathrm{H}^{-}\) to a carbonyl group is the slowest step of the reaction; hence it is the rate-determining step of the reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323490
Cannizzaro reaction is an example of
1 Elimination reaction
2 Disproportionation reaction
3 Decomposition reaction
4 Nucleophilic addition reaction
Explanation:
In Cannizzaro reaction, one molecule of an aldehyde is reduced to alcohol and at the same time second molecule is oxidized to carboxylic acid salt. This is an example of disproportionation reaction. \({\text{2HCHO}}\xrightarrow{{{\text{50 % KOH}}}}{\text{HCOOK + C}}{{\text{H}}_{\text{3}}}{\text{OH}}\)
323487
Identify the correct statements about cannizaro reaction
1 It is a typical reaction of aliphatic aldehyde
2 It is a reaction answered by only aldehydes containing \(\alpha\)-hydrogen
3 It is a reaction answered only by aromatic aldehyde
4 It is a reaction answered by aldehydes containing no \(\alpha\)-Hydrogens.
Explanation:
Aldehydes, which do not contain an \(\alpha\)-hydrogen atom undergoes Cannizzaro reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323488
Which of the following is the correct sequence of step involved in the mechanism of Cannizzaro reaction?
1 Nucleophilic attack, transfer of \(\mathrm{H}^{-}\)and transfer of \(\mathrm{H}^{+}\)
2 Transfer of \(\mathrm{H}^{-}\), transfer of \(\mathrm{H}^{+}\)and nucleophilic attack
3 Transfer of \(\mathrm{H}^{+}\), nucleophilic attack and transfer of \(\mathrm{H}^{-}\)
4 Electrophilic attack by \(\mathrm{OH}^{-}\), transfer of \(\mathrm{H}^{+}\)and transfer of \(\mathrm{H}^{-}\)
Explanation:
Consider the following Cannizzaro reaction, The mechanism of Cannizzaro reaction is as Step I Attack of nucleophile \(\left(\mathrm{OH}^{-}\right)\)to the carbonyl carbon. Step II The transfer of hydride ion from anion (I) to second molecule of aldehyde and finally rapid transfer of proton takes place.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323489
In Cannizzaro reaction given below \({\text{2PhCHO}}\xrightarrow{{{\text{O}}{{\text{H}}^{{\text{ - 1}}}}}}{\text{PhC}}{{\text{H}}_{\text{2}}}{\text{OH + PhCO}}_{\text{2}}^{{\text{ - 1}}}\) the slowest step is
1 The deprotonation of \(\mathrm{PhCH}_{2} \mathrm{OH}\)
2 The attack of \({\rm{O}}{{\rm{H}}^{\rm{\Theta }}}\) at the carboxyl group
3 The transfer of hydride to the carbonyl group
4 The abstraction of proton from the carboxylic group
Explanation:
In cannizaro reaction, the transfer of \(\mathrm{H}^{-}\) to a carbonyl group is the slowest step of the reaction; hence it is the rate-determining step of the reaction.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323490
Cannizzaro reaction is an example of
1 Elimination reaction
2 Disproportionation reaction
3 Decomposition reaction
4 Nucleophilic addition reaction
Explanation:
In Cannizzaro reaction, one molecule of an aldehyde is reduced to alcohol and at the same time second molecule is oxidized to carboxylic acid salt. This is an example of disproportionation reaction. \({\text{2HCHO}}\xrightarrow{{{\text{50 % KOH}}}}{\text{HCOOK + C}}{{\text{H}}_{\text{3}}}{\text{OH}}\)
