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N5 Chemistry Unit 2 Starter

Total questions: 35

Worksheet time: 22mins

Name
Class
Date
1.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
2.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
3.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
4.
Hydrocarbons are compounds that contain
a)
Carbon, only
b)
Carbon and Hydrogen, only
c)
Carbon, Oxygen, and Hydrogen, only
d)
Carbon, Oxygen, Hydrogen, and Nitrogen, only
5.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
6.

Which of the following shows the structure of ethene?

a)
b)
c)
d)
7.
The boiling points and viscosity of alkane molecules increase as their molecular sizes increase.
a)
True
b)
False
8.
The first member of the alkene series is methene.
a)
True
b)
False
9.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
10.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
11.

What chemical is this? (C5H10)

a)

Pent-1-ene

b)

Pentane

c)

Hex-1-ene

d)

Pent-4-ene

12.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
13.

When testing for alkenes (unsaturation) bromine water turns from...

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

14.

What is the molecular formula for cyclopropane?

a)
b)
c)
d)
15.

Which is the general formula of cycloalkanes?

a)

CnH2n

b)

CnH2n+2

c)

CnH2n+1OH

d)

CnH2n+1

16.
Cyclopentane can quickly decolourise bromine water.
a)
true
b)
false
17.
Which of the following is a correct use of a carboxylic acid?
a)
Making plastics
b)
Cleaning products
c)
Toothpaste
18.
Which of the following is made when sodium reacts with propanoic acid?
a)
sodium methanoate
b)
sodium ethanoate
c)
sodium propanoate
d)
potassium propanoate
19.
In energy calculations 'm' stands for
a)
mass
b)
mass of water
c)
mass of fuel
20.

When measuring the heat energy in a fuel, the experimental value is often less than expected. Why is this?

a)

Energy is lost to the surroundings

b)

The experiment is wrong

c)

The reaction is endothermic

21.
Heat energy can be calculated using
a)
Eh = cmΔT
b)
Eh = cΔT
c)
Eh = cTΔm
d)
Eh = TΔm
22.

Which measurements are required in an experiment to calculate heat energy?

a)

mass of the beaker

b)

mass of water

c)

temperature of water at start

d)

temperature of water at end

e)

temperature of fuel

23.

Name this compound...

a)

methane

b)

methene

c)

methanol

d)

methoxymethane

24.

Name the compound

a)

pentan-2-ol

b)

pentan-3-ol

c)

pentanol

d)

pentane

25.

Butanol is a member of the homologous series alcohols.

which one of the following is not a formula of butanol?

a)

C4H10O

b)

C4H10OH

c)

C4H9OH

d)

CH3CH2CH2CH2OH

26.

What gas is produced when magnesium reacts with ethanoic acid?

a)

hydrogen

b)

carbon dioxide

c)

oxygen

d)

chlorine

27.

Complete the word equation for the reaction:

ethanoic acid + potassium carbonate → _________ ________+ carbon dioxide + water

(a)  

28.

What is the following molecule called?

a)

ethanoic acid

b)

propanoic acid

c)

butanoic acid

d)

pentanoic acid

29.

What is the functional group present in a carboxylic acid?

a)

carboxyl

b)

hydroxyl

c)

carbonyl

30.

Ethanoic acid:

a)
b)
c)
d)
31.
a)

A

b)

B

c)

C

d)

D

32.
a)

A

b)

B

c)

C

d)

D

33.
a)

A

b)

B

c)

C

d)

D

34.
a)

A

b)

B

c)

C

d)

D

35.
a)

A

b)

B

c)

C

d)

D

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