NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323616
Formation of cyanohydrin from a ketone is an example of
1 electrophilic addition
2 nucleophilic addition
3 nucleophilic substitution
4 electrophilic substitution.
Explanation:
Thus, it is an example of nucleophilic addition because the attacking species is a nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323617
Which of the following aldehydes is less reactive towards nucleophilic addition reaction?
1 Benzaldehyde
2 Formaldehyde
3 Acetaldehyde
4 Butyraldehyde
Explanation:
Due to bulky aryl group in benzaldehyde, less reactive towards nucleophilic addition.
MHTCET - 2021
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323618
Assertion : Chlorine atom exhibits -I effect in trichloroacetaldehyde. Reason : Acetaldehyde is more reactive than trichloroacetaldehyde.
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.
Explanation:
Trichloroacetaldehyde, with three chlorine atoms inducing a greater -I effect, enhances the electropositivity of the carbonyl carbon. This makes it more reactive in nucleophilic addition reactions compared to acetaldehyde, which lacks such electron-withdrawing chlorine atoms. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323619
The product formed by the reaction of an aldehyde with a primary amine is:
323616
Formation of cyanohydrin from a ketone is an example of
1 electrophilic addition
2 nucleophilic addition
3 nucleophilic substitution
4 electrophilic substitution.
Explanation:
Thus, it is an example of nucleophilic addition because the attacking species is a nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323617
Which of the following aldehydes is less reactive towards nucleophilic addition reaction?
1 Benzaldehyde
2 Formaldehyde
3 Acetaldehyde
4 Butyraldehyde
Explanation:
Due to bulky aryl group in benzaldehyde, less reactive towards nucleophilic addition.
MHTCET - 2021
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323618
Assertion : Chlorine atom exhibits -I effect in trichloroacetaldehyde. Reason : Acetaldehyde is more reactive than trichloroacetaldehyde.
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.
Explanation:
Trichloroacetaldehyde, with three chlorine atoms inducing a greater -I effect, enhances the electropositivity of the carbonyl carbon. This makes it more reactive in nucleophilic addition reactions compared to acetaldehyde, which lacks such electron-withdrawing chlorine atoms. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323619
The product formed by the reaction of an aldehyde with a primary amine is:
323616
Formation of cyanohydrin from a ketone is an example of
1 electrophilic addition
2 nucleophilic addition
3 nucleophilic substitution
4 electrophilic substitution.
Explanation:
Thus, it is an example of nucleophilic addition because the attacking species is a nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323617
Which of the following aldehydes is less reactive towards nucleophilic addition reaction?
1 Benzaldehyde
2 Formaldehyde
3 Acetaldehyde
4 Butyraldehyde
Explanation:
Due to bulky aryl group in benzaldehyde, less reactive towards nucleophilic addition.
MHTCET - 2021
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323618
Assertion : Chlorine atom exhibits -I effect in trichloroacetaldehyde. Reason : Acetaldehyde is more reactive than trichloroacetaldehyde.
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.
Explanation:
Trichloroacetaldehyde, with three chlorine atoms inducing a greater -I effect, enhances the electropositivity of the carbonyl carbon. This makes it more reactive in nucleophilic addition reactions compared to acetaldehyde, which lacks such electron-withdrawing chlorine atoms. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323619
The product formed by the reaction of an aldehyde with a primary amine is:
323616
Formation of cyanohydrin from a ketone is an example of
1 electrophilic addition
2 nucleophilic addition
3 nucleophilic substitution
4 electrophilic substitution.
Explanation:
Thus, it is an example of nucleophilic addition because the attacking species is a nucleophile.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323617
Which of the following aldehydes is less reactive towards nucleophilic addition reaction?
1 Benzaldehyde
2 Formaldehyde
3 Acetaldehyde
4 Butyraldehyde
Explanation:
Due to bulky aryl group in benzaldehyde, less reactive towards nucleophilic addition.
MHTCET - 2021
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323618
Assertion : Chlorine atom exhibits -I effect in trichloroacetaldehyde. Reason : Acetaldehyde is more reactive than trichloroacetaldehyde.
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.
Explanation:
Trichloroacetaldehyde, with three chlorine atoms inducing a greater -I effect, enhances the electropositivity of the carbonyl carbon. This makes it more reactive in nucleophilic addition reactions compared to acetaldehyde, which lacks such electron-withdrawing chlorine atoms. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323619
The product formed by the reaction of an aldehyde with a primary amine is:
