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Aldehydes and ketones
Class 12 · Chemistry · 5 questions
Name: ____________________ Date: ____________
The functional group of aldehydes is:
- A -COOH
- B -OH
- C -CO-
- D -CHO
Which reagent distinguishes aldehydes from ketones?
- A Sodium chloride
- B Bromine water
- C Litmus
- D Tollens' reagent
The simplest ketone is:
- A Ethanal
- B Propanone
- C Methanal
- D Butanone
Reduction of an aldehyde gives a:
- A Carboxylic acid
- B Ester
- C Primary alcohol
- D Secondary alcohol
Fehling's solution is reduced by aldehydes to give a:
- A Blue solution
- B White gas
- C Black solid
- D Red precipitate
Answer key
1. D, 2. D, 3. B, 4. C, 5. D
An aldehyde has the -CHO group.
Aldehydes give a silver mirror with Tollens' reagent. Ketones do not.
Propanone (acetone) is the simplest ketone.
Aldehydes are reduced to primary alcohols.
Copper(II) is reduced to red copper(I) oxide.