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Worksheetsrequirements for combustion
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Which is not combustible substance
a)
Wood
b)
Cow dung cake
c)
stone
d)
paper
2.
What is produced when combustable substance is in the vapour state and burn strongly in the presence of of air?
a)
heat
b)
light
c)
flame
d)
fumes
3.
Are the molecules in wood the same as ash
a)
yes
b)
depends
c)
does it matter
d)
no
4.
The condition which are required for combustion to take place are:
a)
fuel
b)
ignition temperature
c)
oxygen
d)
all of these
5.
Which of these isn't in the fire triangle?
a)
Fuel
b)
Heat
c)
Oxygen
d)
Carbon dioxide
6.
Is combustion a reversible reaction?
a)
Yes.
b)
No.
7.
A good fuel burns neither too fast nor too slowly.
a)
True
b)
False
8.
Which of the following is not a combustible substance?
a)
Wood
b)
Cow dung cake
c)
stone
d)
paper
9.
What are the types of combustion?
a)
Complete & incomplete
b)
Incomplete & inexact
c)
Impossible & complete
d)
Computer & incompete
10.
Complete combustion is when there is plenty of oxygen to react with.
a)
True
b)
False
11.
Incomplete combustion is when there is a limited amount of oxygen.
a)
True
b)
False
12.
What does incomplete combustion produce that complete combustion doesn't?
a)
Carbon monoxide
b)
Water
13.
What is carbon monoxide?
a)
A toxic gas
b)
A large solid
14.
What is the test for hydrogen?
a)
Hydrogen extinguishes a burning splint
b)
Hydrogen burns with a squeaky pop
c)
Hydrogen relights a glowing splint
d)
Hydrogen turns limewater cloudy
15.
What is the test for oxygen?
a)
Oxygen extinguishes a burning splint
b)
Oxygen burns with a squeaky pop
c)
Oxygen relights a glowing splint
d)
Oxygen turns limewater cloudy
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