CHEMISTRY DEPARTMENT WAID ACADEMY ALDEHYDES AND KETONES.

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Presentation transcript:

CHEMISTRY DEPARTMENT WAID ACADEMY ALDEHYDES AND KETONES

How are ketones prepared? 20 Oxidation of an aldehyde. Oxidation of a primary alcohol. Oxidation of a secondary alcohol. Oxidation of a tertiary alcohol.

Which of the compounds shown will be formed by the oxidation of 2-methylbutan-1-ol. 25 A. B. C. D.

What would be seen when compounds X and Y shown below were both reacted with Fehling's solution. 25 Both solutions give an orange-red precipitate. Only solution X gives an orange-red precipitate. Only solution Y gives an orange-red precipitate. Neither solution reacts with the Fehling's solution.

Propanal can be oxidised to propanoic acid by warming with Fehling's solution. The ion-electron equation for the reduction reaction is:- 25 A. B. C. D.

Compound X ,C3H8O, is readily oxidised when heated with acidified potassium permanganate solution to form compound Y, C3H6O. Compound Y resists further oxidation. 30 Compound X is a primary alcohol and compound Y an aldehyde. Compound X is a secondary alcohol and compound Y an aldehyde. Compound X is a primary alcohol and compound Y a ketone. Compound X is a secondary alcohol and compound Y a ketone.

The compound shown below can be formed by the oxidation of. 30 A. B. C. D.

Which of the following shows the names of two compounds both of which can be oxidised to butanoic acid? 25 Butan-2-ol and butanone. Butan-2-ol and butanal. Butan-1-ol and butanone. Butan-1-ol and butanal.

A compound, X, of molecular mass 58 is oxidised forming an alkanoic acid. Compound X is 30 Propan-1-ol. Propan-2-ol. Propanal. Propanone.

Which of the compounds shown is 3-methyl pentanal? 30 A. B. C. D.

Name the compound formed when CH3CH2CH(OH)CH3 is oxidised. 25 Butanoic acid. Butanal. Butanone. Butan-1-ol.