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ALDEHYDES, KETONES AND CARBOXYLIC ACID

26626 Which of the following will undergo aldol condensation

1 Acetaldehyde

2 Propanaldehyde

3 Trideuteroacetaldehyde

4 All of these

Explanation:

(d) Deuterium behaves like $H$ and hence trideuteroacetaldehyde also undergoes aldol condensation but benzaldehyde does not since it has no $α$ -hydrogen.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26627 Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at $5 - 10^{o} C$

1

\begin{matrix} C H_{3} {(C H_{2})}_{3} C \equiv C - C H - C H_{3} \to \\ | \\ O H \end{matrix}

\begin{matrix} O \\ | | \\ C H_{3} {(C H_{2})}_{3} C \equiv C - C - C H_{3} \end{matrix}

2

C H_{3} (C H_{2})_{3} C H = C H - C H_{2} O H \to

C H_{3} (C H_{2})_{3} C H = C H - C H O

3

C_{6} H_{5} C H_{3} \to C_{6} H_{5} C O O H

4

C H_{3} (C H_{2})_{3} C H_{2} O H \to C H_{3} (C H_{2})_{3} C H O

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26628 Acetaldehyde cannot show

1 Iodoform test

2 Lucas test

3 Benedict's test

4 Tollen's test

Explanation:

(b) $1^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$
White turbidity only heating
$2^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ White turbidity
after $5$ min heating
$3^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ easily in seconds

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26629 Benzaldehyde $+ N a O H \to$

1 Benzyl alcohol

2 Benzoic alcohol

3 Hydrobenzamide

4 Cinnamic acid

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26626 Which of the following will undergo aldol condensation

1 Acetaldehyde

2 Propanaldehyde

3 Trideuteroacetaldehyde

4 All of these

Explanation:

(d) Deuterium behaves like $H$ and hence trideuteroacetaldehyde also undergoes aldol condensation but benzaldehyde does not since it has no $α$ -hydrogen.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26627 Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at $5 - 10^{o} C$

1

\begin{matrix} C H_{3} {(C H_{2})}_{3} C \equiv C - C H - C H_{3} \to \\ | \\ O H \end{matrix}

\begin{matrix} O \\ | | \\ C H_{3} {(C H_{2})}_{3} C \equiv C - C - C H_{3} \end{matrix}

2

C H_{3} (C H_{2})_{3} C H = C H - C H_{2} O H \to

C H_{3} (C H_{2})_{3} C H = C H - C H O

3

C_{6} H_{5} C H_{3} \to C_{6} H_{5} C O O H

4

C H_{3} (C H_{2})_{3} C H_{2} O H \to C H_{3} (C H_{2})_{3} C H O

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26628 Acetaldehyde cannot show

1 Iodoform test

2 Lucas test

3 Benedict's test

4 Tollen's test

Explanation:

(b) $1^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$
White turbidity only heating
$2^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ White turbidity
after $5$ min heating
$3^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ easily in seconds

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26629 Benzaldehyde $+ N a O H \to$

1 Benzyl alcohol

2 Benzoic alcohol

3 Hydrobenzamide

4 Cinnamic acid

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26626 Which of the following will undergo aldol condensation

1 Acetaldehyde

2 Propanaldehyde

3 Trideuteroacetaldehyde

4 All of these

Explanation:

(d) Deuterium behaves like $H$ and hence trideuteroacetaldehyde also undergoes aldol condensation but benzaldehyde does not since it has no $α$ -hydrogen.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26627 Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at $5 - 10^{o} C$

1

\begin{matrix} C H_{3} {(C H_{2})}_{3} C \equiv C - C H - C H_{3} \to \\ | \\ O H \end{matrix}

\begin{matrix} O \\ | | \\ C H_{3} {(C H_{2})}_{3} C \equiv C - C - C H_{3} \end{matrix}

2

C H_{3} (C H_{2})_{3} C H = C H - C H_{2} O H \to

C H_{3} (C H_{2})_{3} C H = C H - C H O

3

C_{6} H_{5} C H_{3} \to C_{6} H_{5} C O O H

4

C H_{3} (C H_{2})_{3} C H_{2} O H \to C H_{3} (C H_{2})_{3} C H O

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26628 Acetaldehyde cannot show

1 Iodoform test

2 Lucas test

3 Benedict's test

4 Tollen's test

Explanation:

(b) $1^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$
White turbidity only heating
$2^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ White turbidity
after $5$ min heating
$3^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ easily in seconds

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26629 Benzaldehyde $+ N a O H \to$

1 Benzyl alcohol

2 Benzoic alcohol

3 Hydrobenzamide

4 Cinnamic acid

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26626 Which of the following will undergo aldol condensation

1 Acetaldehyde

2 Propanaldehyde

3 Trideuteroacetaldehyde

4 All of these

Explanation:

(d) Deuterium behaves like $H$ and hence trideuteroacetaldehyde also undergoes aldol condensation but benzaldehyde does not since it has no $α$ -hydrogen.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26627 Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at $5 - 10^{o} C$

1

\begin{matrix} C H_{3} {(C H_{2})}_{3} C \equiv C - C H - C H_{3} \to \\ | \\ O H \end{matrix}

\begin{matrix} O \\ | | \\ C H_{3} {(C H_{2})}_{3} C \equiv C - C - C H_{3} \end{matrix}

2

C H_{3} (C H_{2})_{3} C H = C H - C H_{2} O H \to

C H_{3} (C H_{2})_{3} C H = C H - C H O

3

C_{6} H_{5} C H_{3} \to C_{6} H_{5} C O O H

4

C H_{3} (C H_{2})_{3} C H_{2} O H \to C H_{3} (C H_{2})_{3} C H O

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26628 Acetaldehyde cannot show

1 Iodoform test

2 Lucas test

3 Benedict's test

4 Tollen's test

Explanation:

(b) $1^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$
White turbidity only heating
$2^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ White turbidity
after $5$ min heating
$3^{o}$ Alcohol $\overset{Z n C l_{2} / H C l}{\to}$ easily in seconds

ALDEHYDES, KETONES AND CARBOXYLIC ACID

26629 Benzaldehyde $+ N a O H \to$

1 Benzyl alcohol

2 Benzoic alcohol

3 Hydrobenzamide

4 Cinnamic acid

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