
Class 8 Combustion and flame
Authored by MEENAKSHI MUKHERJEE
Science
8th Grade
NGSS covered
Used 117+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The substances which have very low ignition temperature will
catch fire easily
will not catch fire
catch fire after some time
none of these
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
CNG and LPG are the examples of
solid fuels
liquid fuels
gaseous fuels
they aren't fuels
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
what is combustion
chemical process
physical process
none of these
both a & b
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Ignition temperature is
Lowest temperature at which a substance catches fire
Highest temperature at which a substance catches fire
Any temperature
1000 C
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Fuel may be
Solid
Liquid
Gas
All of the three
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Combustion is a reaction in which a substance reacts with
hydrogen
Nitrogen
Oxygen
Chlorine
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Water cannot be used as a fire extinguisher to put out
Burning coal
Electrical fires
Burning wood
Forest fires
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