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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323423 Assertion :
Acetamide has more polar
supporting img
group than in ethyl acetoacetate.
Reason :
$\overset{\cdot \cdot}{N} H_{2}$ is more electron donating than $\ddot{O} C_{2} H_{5}$ .

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:

Acetamide is more polar than ethyl acetoacetate due to the higher polarity introduced by the amide functional group containing a carbonyl $(C = O)$ group, resulting in a significant polar contribution compared to the ethyl group in ethyl acetoacetate. So the option (1) is correct.

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323424 Identify the product ' $B$ ' in the following series of reactions.
supporting img

1

{CH}_{3} OH

2

C_{2} H_{5} OH

3

{CH}_{3} {CH}_{2} - O - {CH}_{3}

4

{CH}_{3} {CH}_{2} - O - {CH}_{2} {CH}_{3}

Explanation:

$\underset{Ethanoic acid}{{CH}_{3} COOH} + \underset{Ethanol}{{CH}_{2} {CH}_{2} OH} \overset{H^{+}}{⇌}$
$\underset{Ethyl ethanoate}{C H_{2} COC H_{3} C H_{3} + H_{2} O}$
$\to_{Ni/Pd . Δ}^{H_{2}} 2C H_{3} - \underset{Ethanol}{C H_{2}} - OH$

MHTCET - 2021

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323425 In a Claisen condensation reaction (when an ester is treated with a strong base)

1 a proton is removed from the

α

-carbon to form a resonance stabilised carbanion of the ester

2 carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule

3 a new

C - C

bond is formed

4 all of the above statements are correct.

Explanation:

When two molecules of an ester undergo a condensation reaction, the reaction is called as Claisen condensation and product is a $β -$ keto ester.

supporting img

Mechanism :
Step I

Step II

Step III

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323426 Methyl acetate and ethyl acetate can be distinguished by

1 Hot alkaline

{KMnO}_{4}

2 Neutral

{FeCl}_{3}

3 Iodoform test

4 None of the above

AIIMS - 2007

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323427 Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500 atm$ pressure in presence of ${BF}_{3}$ forms ethyl propionate?

1

C_{2} H_{5} OH

2

{CH}_{3} {OCH}_{3}

3

C_{2} H_{5} {OC}_{2} H_{5}

4

{CH}_{3} {OC}_{2} H_{5}

Explanation:

$C_{2} H_{5} O C_{2} H_{5} + CO \to_{[500atm]}^{150^{\circ} C, Δ, B F_{3}} \underset{Ethyl propionate}{C_{2} H_{5} COO C_{2} H_{5}}$

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323423 Assertion :
Acetamide has more polar
supporting img
group than in ethyl acetoacetate.
Reason :
$\overset{\cdot \cdot}{N} H_{2}$ is more electron donating than $\ddot{O} C_{2} H_{5}$ .

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:

Acetamide is more polar than ethyl acetoacetate due to the higher polarity introduced by the amide functional group containing a carbonyl $(C = O)$ group, resulting in a significant polar contribution compared to the ethyl group in ethyl acetoacetate. So the option (1) is correct.

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323424 Identify the product ' $B$ ' in the following series of reactions.
supporting img

1

{CH}_{3} OH

2

C_{2} H_{5} OH

3

{CH}_{3} {CH}_{2} - O - {CH}_{3}

4

{CH}_{3} {CH}_{2} - O - {CH}_{2} {CH}_{3}

Explanation:

$\underset{Ethanoic acid}{{CH}_{3} COOH} + \underset{Ethanol}{{CH}_{2} {CH}_{2} OH} \overset{H^{+}}{⇌}$
$\underset{Ethyl ethanoate}{C H_{2} COC H_{3} C H_{3} + H_{2} O}$
$\to_{Ni/Pd . Δ}^{H_{2}} 2C H_{3} - \underset{Ethanol}{C H_{2}} - OH$

MHTCET - 2021

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323425 In a Claisen condensation reaction (when an ester is treated with a strong base)

1 a proton is removed from the

α

-carbon to form a resonance stabilised carbanion of the ester

2 carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule

3 a new

C - C

bond is formed

4 all of the above statements are correct.

Explanation:

When two molecules of an ester undergo a condensation reaction, the reaction is called as Claisen condensation and product is a $β -$ keto ester.

supporting img

Mechanism :
Step I

Step II

Step III

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323426 Methyl acetate and ethyl acetate can be distinguished by

1 Hot alkaline

{KMnO}_{4}

2 Neutral

{FeCl}_{3}

3 Iodoform test

4 None of the above

AIIMS - 2007

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323427 Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500 atm$ pressure in presence of ${BF}_{3}$ forms ethyl propionate?

1

C_{2} H_{5} OH

2

{CH}_{3} {OCH}_{3}

3

C_{2} H_{5} {OC}_{2} H_{5}

4

{CH}_{3} {OC}_{2} H_{5}

Explanation:

$C_{2} H_{5} O C_{2} H_{5} + CO \to_{[500atm]}^{150^{\circ} C, Δ, B F_{3}} \underset{Ethyl propionate}{C_{2} H_{5} COO C_{2} H_{5}}$

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323423 Assertion :
Acetamide has more polar
supporting img
group than in ethyl acetoacetate.
Reason :
$\overset{\cdot \cdot}{N} H_{2}$ is more electron donating than $\ddot{O} C_{2} H_{5}$ .

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:

Acetamide is more polar than ethyl acetoacetate due to the higher polarity introduced by the amide functional group containing a carbonyl $(C = O)$ group, resulting in a significant polar contribution compared to the ethyl group in ethyl acetoacetate. So the option (1) is correct.

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323424 Identify the product ' $B$ ' in the following series of reactions.
supporting img

1

{CH}_{3} OH

2

C_{2} H_{5} OH

3

{CH}_{3} {CH}_{2} - O - {CH}_{3}

4

{CH}_{3} {CH}_{2} - O - {CH}_{2} {CH}_{3}

Explanation:

$\underset{Ethanoic acid}{{CH}_{3} COOH} + \underset{Ethanol}{{CH}_{2} {CH}_{2} OH} \overset{H^{+}}{⇌}$
$\underset{Ethyl ethanoate}{C H_{2} COC H_{3} C H_{3} + H_{2} O}$
$\to_{Ni/Pd . Δ}^{H_{2}} 2C H_{3} - \underset{Ethanol}{C H_{2}} - OH$

MHTCET - 2021

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323425 In a Claisen condensation reaction (when an ester is treated with a strong base)

1 a proton is removed from the

α

-carbon to form a resonance stabilised carbanion of the ester

2 carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule

3 a new

C - C

bond is formed

4 all of the above statements are correct.

Explanation:

When two molecules of an ester undergo a condensation reaction, the reaction is called as Claisen condensation and product is a $β -$ keto ester.

supporting img

Mechanism :
Step I

Step II

Step III

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323426 Methyl acetate and ethyl acetate can be distinguished by

1 Hot alkaline

{KMnO}_{4}

2 Neutral

{FeCl}_{3}

3 Iodoform test

4 None of the above

AIIMS - 2007

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323427 Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500 atm$ pressure in presence of ${BF}_{3}$ forms ethyl propionate?

1

C_{2} H_{5} OH

2

{CH}_{3} {OCH}_{3}

3

C_{2} H_{5} {OC}_{2} H_{5}

4

{CH}_{3} {OC}_{2} H_{5}

Explanation:

$C_{2} H_{5} O C_{2} H_{5} + CO \to_{[500atm]}^{150^{\circ} C, Δ, B F_{3}} \underset{Ethyl propionate}{C_{2} H_{5} COO C_{2} H_{5}}$

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323423 Assertion :
Acetamide has more polar
supporting img
group than in ethyl acetoacetate.
Reason :
$\overset{\cdot \cdot}{N} H_{2}$ is more electron donating than $\ddot{O} C_{2} H_{5}$ .

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:

Acetamide is more polar than ethyl acetoacetate due to the higher polarity introduced by the amide functional group containing a carbonyl $(C = O)$ group, resulting in a significant polar contribution compared to the ethyl group in ethyl acetoacetate. So the option (1) is correct.

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323424 Identify the product ' $B$ ' in the following series of reactions.
supporting img

1

{CH}_{3} OH

2

C_{2} H_{5} OH

3

{CH}_{3} {CH}_{2} - O - {CH}_{3}

4

{CH}_{3} {CH}_{2} - O - {CH}_{2} {CH}_{3}

Explanation:

$\underset{Ethanoic acid}{{CH}_{3} COOH} + \underset{Ethanol}{{CH}_{2} {CH}_{2} OH} \overset{H^{+}}{⇌}$
$\underset{Ethyl ethanoate}{C H_{2} COC H_{3} C H_{3} + H_{2} O}$
$\to_{Ni/Pd . Δ}^{H_{2}} 2C H_{3} - \underset{Ethanol}{C H_{2}} - OH$

MHTCET - 2021

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323425 In a Claisen condensation reaction (when an ester is treated with a strong base)

1 a proton is removed from the

α

-carbon to form a resonance stabilised carbanion of the ester

2 carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule

3 a new

C - C

bond is formed

4 all of the above statements are correct.

Explanation:

When two molecules of an ester undergo a condensation reaction, the reaction is called as Claisen condensation and product is a $β -$ keto ester.

supporting img

Mechanism :
Step I

Step II

Step III

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323426 Methyl acetate and ethyl acetate can be distinguished by

1 Hot alkaline

{KMnO}_{4}

2 Neutral

{FeCl}_{3}

3 Iodoform test

4 None of the above

AIIMS - 2007

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323427 Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500 atm$ pressure in presence of ${BF}_{3}$ forms ethyl propionate?

1

C_{2} H_{5} OH

2

{CH}_{3} {OCH}_{3}

3

C_{2} H_{5} {OC}_{2} H_{5}

4

{CH}_{3} {OC}_{2} H_{5}

Explanation:

$C_{2} H_{5} O C_{2} H_{5} + CO \to_{[500atm]}^{150^{\circ} C, Δ, B F_{3}} \underset{Ethyl propionate}{C_{2} H_{5} COO C_{2} H_{5}}$

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323423 Assertion :
Acetamide has more polar
supporting img
group than in ethyl acetoacetate.
Reason :
$\overset{\cdot \cdot}{N} H_{2}$ is more electron donating than $\ddot{O} C_{2} H_{5}$ .

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:

Acetamide is more polar than ethyl acetoacetate due to the higher polarity introduced by the amide functional group containing a carbonyl $(C = O)$ group, resulting in a significant polar contribution compared to the ethyl group in ethyl acetoacetate. So the option (1) is correct.

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323424 Identify the product ' $B$ ' in the following series of reactions.
supporting img

1

{CH}_{3} OH

2

C_{2} H_{5} OH

3

{CH}_{3} {CH}_{2} - O - {CH}_{3}

4

{CH}_{3} {CH}_{2} - O - {CH}_{2} {CH}_{3}

Explanation:

$\underset{Ethanoic acid}{{CH}_{3} COOH} + \underset{Ethanol}{{CH}_{2} {CH}_{2} OH} \overset{H^{+}}{⇌}$
$\underset{Ethyl ethanoate}{C H_{2} COC H_{3} C H_{3} + H_{2} O}$
$\to_{Ni/Pd . Δ}^{H_{2}} 2C H_{3} - \underset{Ethanol}{C H_{2}} - OH$

MHTCET - 2021

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323425 In a Claisen condensation reaction (when an ester is treated with a strong base)

1 a proton is removed from the

α

-carbon to form a resonance stabilised carbanion of the ester

2 carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule

3 a new

C - C

bond is formed

4 all of the above statements are correct.

Explanation:

When two molecules of an ester undergo a condensation reaction, the reaction is called as Claisen condensation and product is a $β -$ keto ester.

supporting img

Mechanism :
Step I

Step II

Step III

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323426 Methyl acetate and ethyl acetate can be distinguished by

1 Hot alkaline

{KMnO}_{4}

2 Neutral

{FeCl}_{3}

3 Iodoform test

4 None of the above

AIIMS - 2007

CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323427 Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500 atm$ pressure in presence of ${BF}_{3}$ forms ethyl propionate?

1

C_{2} H_{5} OH

2

{CH}_{3} {OCH}_{3}

3

C_{2} H_{5} {OC}_{2} H_{5}

4

{CH}_{3} {OC}_{2} H_{5}

Explanation:

$C_{2} H_{5} O C_{2} H_{5} + CO \to_{[500atm]}^{150^{\circ} C, Δ, B F_{3}} \underset{Ethyl propionate}{C_{2} H_{5} COO C_{2} H_{5}}$

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