AS CHEMISTRY
ORGANIC SYNTHESIS
MULTIPLE CHOICE QUESTIONS
1. The conversion of methane into chloromethane in the presence of UV light is an example of...
electrophilic addition elimination free radical substitution nucleophilic substitution
2. The conversion of propene into 1,2-dibromopropane is an example of...
3. The conversion of 2-bromopropane into propene is an example of...
4. The conversion of 2-bromopropane into propan-2-ol is an example of...
5. Which one of the following cannot be made from 1-bromopropane in a single reaction?
propan-1-ol propane propene propylamine
6. Which of the following cannot be made from propan-2-ol in a single reaction?
2-bromopropane propanal propanone propene
7. When propene reacts with hydrogen bromide, the product(s) of the reaction is/are...
1-bromopropane only 2-bromopropane only a mixture of 1-bromopropane and 2-bromopropane 1,2-dibromopropane
8. If the product of the reaction between C2H4 and HBr is treated with aqueous NaOH, you get...
CH3CHO C2H5OH C2H4 C2H4Br2
9. Which of the following conversions does not involve oxidation?
propan-1-ol to propanal propan-2-ol to propanone propanal to propanoic acid propene to propane
10. The conversion of ethane into ethylamine involves...
electrophilic substitution followed by nucleophilic substitution free radical substitution followed by nucleophilic substitution free radical substitution followed by elimination nucleophilic substitution followed by free radical substitution
11. Which of the following reactions of propan-1-ol involves elimination?
propan-1-ol to propanal propan-1-ol to propanoic acid propan-1-ol to propene propan-1-ol to 1-bromopropane
12. Which one of the following is the major product when chloroethane reacts with excess ammonia?
ethylamine diethylamine triethylamine tetraethylammonium chloride
13. The number of isomeric alkenes formed when butan-2-ol undergoes elimination is...
1 2 3 4
14. If butan-1-ol is treated with concentrated phosphoric acid and the product is treated with HBr, you get...
but-1-ene 1-bromobutane only 2-bromobutane only a mixture of 1-bromobutane and 2-bromobutane
15. If ethanol is oxidised to a carboxylic acid and that acid is treated with ethanol, you would make...
CH3COOH CH3COOCH3 CH3COOC2H5 C2H5COOC2H5
16. In order to synthesise butyl propanoate you would use...
C3H7OH and CH3COOH C4H9OH and CH3COOH C3H7OH and C3H7COOH C4H9OH and C2H5COOH
17. 2-bromopropane can be converted into propanone by...
substitution using aqueous NaOH substitution followed by dehydration then oxidation treatment with alcoholic OH- followed by oxidation of the organic product substitution using aqueous NaOH, followed by oxidation of the product
18. The best way of obtaining a high yield of 2-bromopropane is...
treating propane with bromine in the presence of UV light treating propane with hydrogen bromide treating propene with hydrogen bromide treating propene with bromine
19. In order to synthesise butanal from 1-bromobutane you can...
reflux butanal with aqueous KOH then oxidise the organic product, distilling off the butanal reflux butanal with aqueous KOH then oxidise the organic product by refluxing with acidified dichromate reflux butanal with alcoholic KOH then oxidise the organic product by refluxing with acidified dichromate reflux butanal with alcoholic KOH then oxidise the organic product using distillation
20. The reaction between an alcohol and a carboxylic acid is an example of...
addition elimination esterification substitution
21. Which one of the following reactions does not produce a mixture of structural isomers?
the reaction of but-1-ene with HBr the reaction of but-2-ene with HBr the dehydration of butan-2-ol the reaction of 2-bromobutane with alcoholic NaOH
22. If ethyl ethanoate undergoes hydrolysis and one of the products undergoes dehydration you will make...
ethane ethanal ethanol ethene
23. Which of the following transformations does not involve addition?
ethene to bromoethane ethene to poly(ethene) ethene to ethanol ethanol and ethanoic acid to ethyl ethanoate
24. In which one of the following transformations does the product contain fewer atoms than the reactant?
bromoethane to ethylamine ethene to bromoethane ethanol to ethanal ethanal to ethanoic acid
25. Hydrolysis of a primary haloalkane followed by partial oxidation of the product produces...
an alcohol an aldehyde a carboxylic acid a ketone