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OCR AS Organic chemistry

Total questions: 16

Worksheet time: 14mins

Name
Class
Date
1.

What is the name of this compound?

a)

ethanol

b)

ethanal

c)

ethanone

d)

methanal

2.

What is the name of this compound?

a)

propan-2-al

b)

propanane

c)

propanone

d)

propanal

3.

Which compound is a structural isomer of Z-but-2-ene?

a)

butane

b)

E-but-2-ene

c)

cyclobutane

d)

methylbut-2-ene

4.

Which equation is a propagation step in the conversion of trichloromethane into tetrachloromethane by reaction with chlorine in the presence of ultraviolet light?

a)

CHCl3 + Cl2 ⟶ CCl4 + HCl

b)

●CCl3 + ●Cl ⟶ CCl4

c)

CHCl3 + ●Cl ⟶ CCl4 + ●H

d)

●CCl3 + Cl2 ⟶ CCl4 + ●Cl

5.

How many structural isomers are there with the molecular formula C3H6BrCl?

a)

4

b)

5

c)

6

d)

7

6.

An organic compound is found to contain 40.0% carbon, 6.7% hydrogen and 53.3% oxygen.Which of the following compounds could this be?

a)

Ethanol

b)

Ethanoic acid

c)

Methanol

d)

Methanoic acid

7.

Which one of the following mechanisms is not involved in the reaction sequence below?

CH3CH3 → CH3CH2Cl → CH3CH2OH → CH2=CH2 → CH3CH2Br

a)

electrophilic addition

b)

electrophilic substitution

c)

nucleophilic substitution

d)

free-radical substitution

8.

What is the correct systematic name for

a)

2-bromo-3-methylpent-2-ene

b)

2-bromo-3-ethylbut-2-ene

c)

3-bromo-2-ethylbut-2-ene

d)

4-bromo-3-methylpent-3-ene

9.

Which pair of brackets contains the repeat unit for this polymer?

a)

(...)

b)

[...]

c)

{...}

10.

Which diagram gives the skeletal formula of

2-chloropentan-3-ol ?

a)

A

b)

B

c)

C

d)

D

11.

Which reaction is not an electrophilic addition ?

a)

A

b)

B

c)

C

d)

D

12.

Bromine reacts with ethene to form 1, 2-dibromoethane.

What is the correct description of the organic intermediate in this reaction ?

a)

It has a negative charge

b)

It is a free radical

c)

It is a nucleophile

d)

It is an electrophile

13.

A reaction between chlorine and propane in UV light produces 2 isomeric monochloropropanes, C3H7Cl, as products. Which information about this reaction is correct ?

a)

A

b)

B

c)

C

d)

D

14.

Which molecules would be present in the mixture produced by the photochemical chlorination of methane ?


1) Hydrogen

2) Hydrogen Chloride

3) dichloromethane

a)

A

b)

B

c)

C

d)

D

15.
a)

A

b)

B

c)

C

d)

D

16.

Which pair of homologous series have the same C:H ratio in their general formula


1) Aldehydes and Ketones

2) Carboxylic acids and esters

3) Alkenes and Ketones

a)

A

b)

B

c)

C

d)

D