Higher Chemistry

Unit 2Section 4 - Aldehydes & KetonesMultiple Choice Questions

This is designed to be used by teachers to help students develop skills in answering multiple choice questions.

Douglas Racey, Waid Academy, Anstruther, Fife, Scotland

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

Answer

1. Which of the following is an isomer of hexanal?

A. 2-methyl butanalB. 3-methylpentan-2-oneC. 2,2-dimethylbutan-1-olD. 3-ethylpentanal

B.

2. Which of the following cannot be classed as oxidation?

A. CH3CH2OH CH3CHO

B. CH3CH(OH)CH3 CH3COCH3

C. CH3COCH3 CH3CH(OH)CH3

D. CH3CH2OH + O2 CO2 + H2O

Answer C.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

3. Which alkanol will produce a ketone on oxidation using acidified potassium dichromate?

A. 2-methyl butan-2-olB. pentan-1-olC. 3-methyl hexan-2-olD. 2-methyl propan-2-ol

Answer C.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

4. The alcohol shown below will

A. oxidise to form an aldehydeB. oxidise to form a ketoneC. oxidise to form an aldehyde and a

ketoneD. not oxidise

Answer D.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

5. Oxidation of 4-methylpentan-2-ol to the corresponding ketone results in the alcohol

A. losing 2g per moleB. gaining 2g per moleC. gaining 16g per moleD. not changing in mass

Answer A.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

6. When propanal is heated with Fehling’s solution there is

A. a colour change from green to orangeB. a colour change from blue to

red/orangeC. a negative test with Tollen’s reagentD. no colour change

Answer B.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

7. When butanone is heated with Fehling’s solution there is

A. a colour change from orange to greenB. a colour change from blue to

red/orangeC. a silver mirror formedD. no colour change

Answer D.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

8. When the vapour of liquid X is passed over hot copper(II)oxide, a reaction occurs and the vapour produced gives an orange precipitate with Fehling’s solution. X could be

A. propan-1-olB. propan-2-olC. propanalD. propanone

Answer A.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

9. Butan-1-ol is converted to butanal by warming it with potassium dichromate acidified with sulphuric acid. The purpose of the acidified dichromate is to

A. reduce the alcoholB. dehydrate the alcoholC. hydrate the alcoholD. oxidise the alcohol

Answer D.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions

10.Which compound is formed by the oxidation of propan-2-ol

A. CH3CH2CHO

B. CH3COCH3

C. CH3CH2COOH

D. CH3CH2CH2OH

Answer B.

Higher Chemistry Unit 2 - Section 4 Aldehydes and Ketones…. Multiple Choice Questions