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WorksheetsChromatography and Fractional Distillation
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
The chromatogram shows that the -------------- spot is a mixture.
a)
red
b)
orange
c)
green
d)
black
2.
The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?
a)
P only
b)
S only
c)
P and S
d)
P and X
3.
A substance is soluble if it can be dissolved.
In paper chromatography, the most soluble solute _____________________ .
a)
does not move from the start point
b)
stays closest to the start point
c)
travels furthest away from the start point
d)
can be found in the middle of the chromatogram
4.
The Rf value for the blue component is
a)
0.3
b)
0.7
c)
10
d)
3
5.
The Rf value for the red component is
a)
0.3
b)
0.7
c)
10
d)
7
6.
A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called
a)
Fractional distillation
b)
filtration
c)
crystallization
d)
evaporation
7.
Which letter in the diagram of Industrial Crude Oil Fractions identifies 'Petroleum Gas'?
a)
A
b)
B
c)
C
d)
D
8.
Which letter in the diagram of Industrial Crude Oil Fractions identifies 'Diesel'?
a)
B
b)
D
c)
G
d)
H
9.
Which letter in the diagram of Industrial Crude Oil Fractions identifies 'Bitumen'?
a)
B
b)
D
c)
G
d)
H
10.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
11.
What does the viscosity of a hydrocarbon tell you?
a)
How easily it flows
b)
How easily it sets alight
c)
What its boiling point is
d)
How long the hydrocarbon is
12.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
13.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
14.
What is kerosene used for?
a)
Fuel for ships
b)
Fuel for lorries
c)
Fuel for airplanes
d)
Making roads
15.
What is the correct order for the fractions that come out of crude oil?
a)
fuel gases, petrol, kerosene, diesel, fuel oil, residue
b)
fuel gases, petrol, diesel, kerosene, fuel oil, residue
c)
fuel gases, kerosene, petrol, diesel, fuel oil, residue
d)
fuel gases, diesel, kerosene, petrol, fuel oil, residue
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