Acid Catalysed Acetal Formation
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Acetal or ketal is :
- α, ω-dialkoxy compound
- α‑alkoxy alcohol
Gem dialkoxy compound
Vic dialkoxy compound
- pH = 1
- pH = 4.5
- any value of pH
- pH = 12
From the reactions shown, A and B respectively are:
A: vinyl chloride; B: ethanol in acid (catalytic)
A: methyl magnesium bromide + work up; B: methanol in acid (catalytic)
A: allyl bromide; B: ethanol in acid (catalytic)
A: vinyl magnesium chloride; B: ethanol in acid (catalytic)
The product(s) the following hydrolysis is/are:
- α, δ di-hydroxy carboxylic acid
- a lactone
- acetone
- acetaldehyde
In dilute aqueous solution, formaldehyde exists as ?
formaldehyde
Paraldehyde
Trixymethylene
Methyleneglycol
Acetal formation is a reversible reaction
Under what conditions, the reaction can be forced to proceed only in right (forward) direction ?
Using excess of alcohol
Using high temperature
Using dry acid and excess of alcohol
Using dilute acid and excess of alcohol

- An aldol
- An acetal
- A ketal
- A hemiacetal
The product X in this reaction is: