Which one of the following reagents can distinguish between an aldehyde and a ketone?
Fehling's solution
H2SO4 solution
NaHSO4
NH3
A.
Fehling's solution
Aldehyde reacts with Fehling solution to give red precipitate of Cu2O but ketone doesn't give red precipitate with Fehling solution.
R-COH + CuO → R-COOH + Cu2O↓
R-CO-R' + CuO → No reaction
Dry distillation of the mixture of calcium formate and calcium acetate gives
acetone
acetaldehyde
formaldehyde
formic acid
Trioxane has the formula , it is prepared from
formaldehyde
methanol
dichloromethane
vinyl alcohol
When methyl cyanide is hydrolysed in presence of alkali, the product is
acetamide
methane
CO2 + H2O
acetic acid
Which of the following reacts with phenol to give salicylaldehyde after hydrolysis?
Dichloro methane
Trichloro methane
Methyl chloride
None of these