WorksheetsClass 8 Science, Combustion and flame
Total questions: 15
Worksheet time: 8mins
Which one of the following is fuel of our body?
Petrol
Diesel
Water
Food
Which of the following is inflammable Substances?
Petrol
Wood
Paper
Straw
Combustion is a reaction in which a substance reacts with
hydrogen
Nitrogen
Oxygen
Chlorine
Good fuel is
Readily available
Cheap
Burn easily in air
All of these
Which is the hottest part in the flame of the candle
Yellow
Wax part
Black
Blue
Fire extinguisher-
Raise up temperature of fuel
Bring down the temperature of fuel
Cut off the supply of air
None of these
In the presence of water, ignition Temperature of paper is-
Decrease
Increase
Remain constant
None of these
Which one of the following is combustible?
Iron nail
Glass
Stone pieces
Paper
ignition temperature is
any temperature at which a substance catches fire
highest temperature at which a substances catches fire
lowest temperature at which a substance catches fire
CNG and LPG are the examples of
solid fuels
liquid fuels
gaseous fuels
they aren't fuels
The substances which have very low ignition temperature will
catch fire easily
will not catch fire
catch fire after some time
none of these
coal burns with _________
flame
only glow
both a & b
none of these
Like fuel the sun also provides heat and light. The process taking place in the sun is called
combustion
nuclear process
burning
all of these
Which substance give heat and light after combustion
flame
fuel
combustion
none of these
NAME THE HOTTEST PART OF FLAME
YELLOW REGION
INNERMOST REGION
OUTERMOST REGION
MIDDLE REGION
