Worksheetscombustion and flame class 8
Total questions: 20
Worksheet time: 10mins
What is combustion?
(a)
What is essential for combustion?
Oxygen
Water
Helium
Paper
The burning of LPG is an example of:
Explosion
Rapid Combustion
Spontaneous Combustion
Global Warming
What are the 3 types of combustion?
Inflammable combustion, Rapid combustion, calorific combustion
Fuel combustion, industrial combustion, luminous combustion
Rapid combustion, spontaneous combustion, explosion
A circular blackish ring is formed the glass plate when you burn it, it is (a)
Combustion in which a material suddenly bursts into flames
Spontaneous Combustion
Rapid Combustion
Explosion
SLow combustion
The gas burns rapidly and produces heat and light, is
Spontaneous combustion
Rapid combustion
Explosion
Slow combustion
The substances catches fire with flame are called (a)
If electrical equipment is on fire, ______ can be used as a extinguisher
water
CO2
baking soda
air
The most common fire extinguisher is
sand
oil
blanket
water
The three essential requirement for producing fire---------------,------------- &-------------.
(a)
Which one of the following catches fire in room temperature
Kerosene
LPG
Phosphorus
wood
Ignition temperature is
Medium temperature
100 degrees
Lowest temperature
Highest temperaturee
Food is broken down by reaction with oxygen and ------------ is produced
(a)
Which one of the following is not a fuel
Straw
food
petrol
diesel
Non combustible substance
paper
straw
matchsticks
wood
combustion is
Physical process
chemical process
Natural process
Biological process
Coal is an inflammable fuel.
True
False
The burning of LPG is an example of
rapid combustion
spontaneous combustion
slow combustion
explosion
Which one of the following gases is used in combustion?
Hydrogen
Oxygen
Nitrogen
Carbon dioxide
