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
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Which of the following compounds is an aldehyde?
Acetone
Ethanol
Propanal
Butanone
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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
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What is the general formula of aldehydes?
R-OH
R-CO-R
R-CO-R'
R-CHO
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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
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Which of the following compounds is a ketone?
Methanal
Ethanal
Propanone
Butanal
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Which of the following aldehydes is used as a preservative in the food industry?
Formaldehyde
Benzaldehyde
Acetaldehyde
Propionaldehyde
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Aldehydes and ketones can be reduced to form:
Alcohols
Carboxylic acids
Esters
Amines
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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
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Which of the following aldehydes is commonly found in cinnamon oil?
Formaldehyde
Benzaldehyde
Acetaldehyde
Propanal
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