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Worksheetschapter 7-Air
Total questions: 14
Worksheet time: 12mins
Name
Class
Date
1.
Air has mass and ..................
a)
occupies space
b)
do not occupies space
2.
How much is the percentage of Nitrogen in air?
a)
0.03 %
b)
78 %
c)
21 %
d)
trace
3.
How much is the percentage of CO2 in air ?
a)
21
b)
0.03
4.
Does air contains water vapour ?
a)
Yes
b)
No
5.
Is air a mixture or compound ?
a)
mixture
b)
compound
6.
what is the suitable method to separate air components ?
a)
chromatography
b)
Fractional distillation
c)
using magnet
7.
- Respiration
-Combustion of rocket engine
-Welding and steel cutting
are examples of importance of ........
-Combustion of rocket engine
-Welding and steel cutting
are examples of importance of ........
a)
inert gas
b)
nitrogen
c)
carbon dioxide
d)
oxygen
8.
- photosynthesis
- production of carbonated drinks
-Fire extinguisher
-carbon cycle
are examples of importance of ...
- production of carbonated drinks
-Fire extinguisher
-carbon cycle
are examples of importance of ...
a)
inert gas
b)
nitrogen
c)
carbon dioxide
d)
oxygen
9.
-production of Nitric Acid and ammonia
-Nitrogen Cycle
-Liquid nitrogen as cooling agent
are examples of importance of ...
-Nitrogen Cycle
-Liquid nitrogen as cooling agent
are examples of importance of ...
a)
inert gas
b)
nitrogen
c)
carbon dioxide
d)
oxygen
10.
-hot balloons and weather ballons
-Advertising lights
-lights bulbs
uses.........
-Advertising lights
-lights bulbs
uses.........
a)
inert gas
b)
nitrogen
c)
carbon dioxide
d)
oxygen
11.
What are the two processes that add carbon dioxide into the atmosphere
a)
photosynthesis
b)
respiration and photosynthesis
c)
respiration and decomposition
12.
all the processes below use oxygen in the air except
a)
combustion
b)
combustion and respiration
c)
rusting
d)
photosynthesis
13.
All these conditions are needed for combustion to occur except :
a)
oxygen
b)
fuel
c)
carbon dioxide
d)
heat
14.
carbon dioxide type of fire extinguisher cannot extinguish which material on fire?
a)
metal
b)
liquid
c)
gas
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