Organic Chemistry: Aldehydes, Ketones, and Carboxylic Acids - SS3 Chemistry Past Questions and Answers - page 1
Which of the following functional groups is present in both aldehydes and ketones?
Alcohol
Carboxylic acid
Carbonyl
Ester
Which of the following compounds is an aldehyde?
Acetone
Ethanol
Propanal
Butanone
Which of the following reagents can be used to distinguish between an aldehyde and a ketone?
Tollen's reagent
Fehling's solution
Sodium hydroxide
Sodium chloride
What is the general formula of aldehydes?
R-OH
R-CO-R
R-CO-R'
R-CHO
Which of the following reactions is a characteristic test for aldehydes?
Addition of ammonia
Formation of a silver mirror with Tollens's reagent
Esterification reaction
Formation of a carboxylic acid with a primary alcohol
Which of the following compounds is a ketone?
Methanal
Ethanal
Propanone
Butanal
Which of the following aldehydes is used as a preservative in the food industry?
Formaldehyde
Benzaldehyde
Acetaldehyde
Propionaldehyde
Aldehydes and ketones can be reduced to form:
Alcohols
Carboxylic acids
Esters
Amines
Which of the following reactions is used to distinguish between an aldehyde and a ketone?
Formation of a silver mirror with Tollens's reagent
Formation of a precipitate with Fehling's solution
Formation of a carboxylic acid with a primary alcohol
Formation of an ester with an alcohol
Which of the following aldehydes is commonly found in cinnamon oil?
Formaldehyde
Benzaldehyde
Acetaldehyde
Propanal