QBManager

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28211 In the given reaction $C_{6} H_{5} C H O + X \underset{(i i) H O H / N H_{4} C l}{\overset{(i) Z n}{\to}} \begin{matrix} O H \\ | \\ C_{6} H_{5} - C H - C H_{2} - C O O C_{2} H_{5} \end{matrix}$ $[X]$ will be:

1

C H_{3} - C O O C_{2} H_{5}

2

C H_{3} - C H_{2} - C O O C_{2} H_{5}

3

B r - C H_{2} - C O O C_{2} H_{5}

4

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28212 The given reaction $C_{6} H_{5} - C H O + B r - C H_{2} - C O O C_{2} H$ $\underset{(i i) H O H / N H_{4} C l (i i i) Δ}{\overset{(i) Z n}{\to}}$ $C_{6} H_{5} - C H = C H - C O O C_{2} H_{5}$ is known as :

1 Perkin reaction

2 Knoevenagel reaction

3 Reformatsky reaction

4 Claisen-Schmidt reaction

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28213 Cannizzaro reaction is example of :

1 Redox reaction

2 Disproportionation

3 Both

(A)

and

(B)

4 Only oxidation

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28214 Acetaldehyde can be converted into $\begin{matrix} C H_{2} O H \\ | \\ H O - C H_{2} - C - C H_{2} O H \\ | \\ C H_{2} O H \end{matrix}$ by which reagent ?

1

K O H

2

K O H

followed by

L A H

3 excess of

H C H O

and

K O H

4

K C N

followed by

S B H

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28215 Metaformaldehyde is:

1 Dimmer of

H C H O

2 Trimer of formaldehyde

3 Tetramer of formaldehyde

4 Polymer in which number of

H C H O

unit is more than

100

Explanation:

Metaformaldehyde is trimer of formaldehyde. It is also called $1, 3, 5$ -trioxane, trioxane or trioxin.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28211 In the given reaction $C_{6} H_{5} C H O + X \underset{(i i) H O H / N H_{4} C l}{\overset{(i) Z n}{\to}} \begin{matrix} O H \\ | \\ C_{6} H_{5} - C H - C H_{2} - C O O C_{2} H_{5} \end{matrix}$ $[X]$ will be:

1

C H_{3} - C O O C_{2} H_{5}

2

C H_{3} - C H_{2} - C O O C_{2} H_{5}

3

B r - C H_{2} - C O O C_{2} H_{5}

4

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28212 The given reaction $C_{6} H_{5} - C H O + B r - C H_{2} - C O O C_{2} H$ $\underset{(i i) H O H / N H_{4} C l (i i i) Δ}{\overset{(i) Z n}{\to}}$ $C_{6} H_{5} - C H = C H - C O O C_{2} H_{5}$ is known as :

1 Perkin reaction

2 Knoevenagel reaction

3 Reformatsky reaction

4 Claisen-Schmidt reaction

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28213 Cannizzaro reaction is example of :

1 Redox reaction

2 Disproportionation

3 Both

(A)

and

(B)

4 Only oxidation

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28214 Acetaldehyde can be converted into $\begin{matrix} C H_{2} O H \\ | \\ H O - C H_{2} - C - C H_{2} O H \\ | \\ C H_{2} O H \end{matrix}$ by which reagent ?

1

K O H

2

K O H

followed by

L A H

3 excess of

H C H O

and

K O H

4

K C N

followed by

S B H

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28215 Metaformaldehyde is:

1 Dimmer of

H C H O

2 Trimer of formaldehyde

3 Tetramer of formaldehyde

4 Polymer in which number of

H C H O

unit is more than

100

Explanation:

Metaformaldehyde is trimer of formaldehyde. It is also called $1, 3, 5$ -trioxane, trioxane or trioxin.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28211 In the given reaction $C_{6} H_{5} C H O + X \underset{(i i) H O H / N H_{4} C l}{\overset{(i) Z n}{\to}} \begin{matrix} O H \\ | \\ C_{6} H_{5} - C H - C H_{2} - C O O C_{2} H_{5} \end{matrix}$ $[X]$ will be:

1

C H_{3} - C O O C_{2} H_{5}

2

C H_{3} - C H_{2} - C O O C_{2} H_{5}

3

B r - C H_{2} - C O O C_{2} H_{5}

4

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28212 The given reaction $C_{6} H_{5} - C H O + B r - C H_{2} - C O O C_{2} H$ $\underset{(i i) H O H / N H_{4} C l (i i i) Δ}{\overset{(i) Z n}{\to}}$ $C_{6} H_{5} - C H = C H - C O O C_{2} H_{5}$ is known as :

1 Perkin reaction

2 Knoevenagel reaction

3 Reformatsky reaction

4 Claisen-Schmidt reaction

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28213 Cannizzaro reaction is example of :

1 Redox reaction

2 Disproportionation

3 Both

(A)

and

(B)

4 Only oxidation

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28214 Acetaldehyde can be converted into $\begin{matrix} C H_{2} O H \\ | \\ H O - C H_{2} - C - C H_{2} O H \\ | \\ C H_{2} O H \end{matrix}$ by which reagent ?

1

K O H

2

K O H

followed by

L A H

3 excess of

H C H O

and

K O H

4

K C N

followed by

S B H

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28215 Metaformaldehyde is:

1 Dimmer of

H C H O

2 Trimer of formaldehyde

3 Tetramer of formaldehyde

4 Polymer in which number of

H C H O

unit is more than

100

Explanation:

Metaformaldehyde is trimer of formaldehyde. It is also called $1, 3, 5$ -trioxane, trioxane or trioxin.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28211 In the given reaction $C_{6} H_{5} C H O + X \underset{(i i) H O H / N H_{4} C l}{\overset{(i) Z n}{\to}} \begin{matrix} O H \\ | \\ C_{6} H_{5} - C H - C H_{2} - C O O C_{2} H_{5} \end{matrix}$ $[X]$ will be:

1

C H_{3} - C O O C_{2} H_{5}

2

C H_{3} - C H_{2} - C O O C_{2} H_{5}

3

B r - C H_{2} - C O O C_{2} H_{5}

4

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28212 The given reaction $C_{6} H_{5} - C H O + B r - C H_{2} - C O O C_{2} H$ $\underset{(i i) H O H / N H_{4} C l (i i i) Δ}{\overset{(i) Z n}{\to}}$ $C_{6} H_{5} - C H = C H - C O O C_{2} H_{5}$ is known as :

1 Perkin reaction

2 Knoevenagel reaction

3 Reformatsky reaction

4 Claisen-Schmidt reaction

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28213 Cannizzaro reaction is example of :

1 Redox reaction

2 Disproportionation

3 Both

(A)

and

(B)

4 Only oxidation

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28214 Acetaldehyde can be converted into $\begin{matrix} C H_{2} O H \\ | \\ H O - C H_{2} - C - C H_{2} O H \\ | \\ C H_{2} O H \end{matrix}$ by which reagent ?

1

K O H

2

K O H

followed by

L A H

3 excess of

H C H O

and

K O H

4

K C N

followed by

S B H

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28215 Metaformaldehyde is:

1 Dimmer of

H C H O

2 Trimer of formaldehyde

3 Tetramer of formaldehyde

4 Polymer in which number of

H C H O

unit is more than

100

Explanation:

Metaformaldehyde is trimer of formaldehyde. It is also called $1, 3, 5$ -trioxane, trioxane or trioxin.

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28211 In the given reaction $C_{6} H_{5} C H O + X \underset{(i i) H O H / N H_{4} C l}{\overset{(i) Z n}{\to}} \begin{matrix} O H \\ | \\ C_{6} H_{5} - C H - C H_{2} - C O O C_{2} H_{5} \end{matrix}$ $[X]$ will be:

1

C H_{3} - C O O C_{2} H_{5}

2

C H_{3} - C H_{2} - C O O C_{2} H_{5}

3

B r - C H_{2} - C O O C_{2} H_{5}

4

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28212 The given reaction $C_{6} H_{5} - C H O + B r - C H_{2} - C O O C_{2} H$ $\underset{(i i) H O H / N H_{4} C l (i i i) Δ}{\overset{(i) Z n}{\to}}$ $C_{6} H_{5} - C H = C H - C O O C_{2} H_{5}$ is known as :

1 Perkin reaction

2 Knoevenagel reaction

3 Reformatsky reaction

4 Claisen-Schmidt reaction

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28213 Cannizzaro reaction is example of :

1 Redox reaction

2 Disproportionation

3 Both

(A)

and

(B)

4 Only oxidation

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28214 Acetaldehyde can be converted into $\begin{matrix} C H_{2} O H \\ | \\ H O - C H_{2} - C - C H_{2} O H \\ | \\ C H_{2} O H \end{matrix}$ by which reagent ?

1

K O H

2

K O H

followed by

L A H

3 excess of

H C H O

and

K O H

4

K C N

followed by

S B H

ALDEHYDES, KETONES AND CARBOXYLIC ACID

28215 Metaformaldehyde is:

1 Dimmer of

H C H O

2 Trimer of formaldehyde

3 Tetramer of formaldehyde

4 Polymer in which number of

H C H O

unit is more than

100

Explanation:

Metaformaldehyde is trimer of formaldehyde. It is also called $1, 3, 5$ -trioxane, trioxane or trioxin.

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