Acid Catalysed Acetal Formation

Q.

Acetal or ketal is :

1. $\alpha$, $\omega$-dialkoxy compound
2. $\alpha$‑alkoxy alcohol

3. Gem dialkoxy compound

4. Vic dialkoxy compound

Q. Of the following, which compound is an acetal?

1. 
2. 
3. 
4. 

Q. $C{H}_{3}CHO+H_{2}NOH-\to C{H}_{3}CH=N-OH$ The above reaction occurs at:

1. pH = 1
2. pH = 4.5
3. any value of pH
4. pH = 12

Q.

From the reactions shown, A and B respectively are:

1. A: vinyl chloride; B: ethanol in acid (catalytic)

2. A: methyl magnesium bromide + work up; B: methanol in acid (catalytic)

3. A: allyl bromide; B: ethanol in acid (catalytic)

4. A: vinyl magnesium chloride; B: ethanol in acid (catalytic)

Q.

The product(s) the following hydrolysis is/are:

1. α, δ di-hydroxy carboxylic acid
2. a lactone
3. acetone
4. acetaldehyde

Q.

In dilute aqueous solution, formaldehyde exists as ?

1. formaldehyde

2. Paraldehyde

3. Trixymethylene

4. Methyleneglycol

Q.

Acetal formation is a reversible reaction

Under what conditions, the reaction can be forced to proceed only in right (forward) direction ?

1. Using excess of alcohol

2. Using high temperature

3. Using dry acid and excess of alcohol

4. Using dilute acid and excess of alcohol

Q. Which of the following will be the product of the given reaction?

1. 
2. 
3. 
4. 

Q. Compound formed by the reaction of furfural with ethanol is:

1. An aldol
2. An acetal
3. A ketal
4. A hemiacetal

Q. Acetone $\stackrel{ethyleneglycol}{\to }$ X.
The product X in this reaction is: