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WorksheetsCombustion and flame quiz
Total questions: 15
Worksheet time: 8mins
Combustion is a ____________ process
Physical
There is no process involved in the process of combustion.
Chemical
Both
What is this called
combustion's cycle
Fire tricolour
triangle of fire's combustion
Fire triangle
Why did the flame die in case (c) ?
It didn't want to
Not sufficient elements
Not enough air
I don't know
Define combustion....
The process of burning a substance in the presence of oxygen to give out heat and light
Combustion is a chemical process where something burns for our use
When something burns in the presence of oxygen, it is called combustion
When a particular object catches fire, in the presence of air (oxygen), it is called combustion
True or false :
The burning of white phosphorus is a rapid combustion
TRUE
FALSE
Is wood a inflammable substance ??
NO !!
maybe....
sometimes
I don't really know (seriously !!??)
Check all the factors of combustion
oxygen
an object
nitrogen
Ignition temperature
combustible substance
Incomplete combustion gives out _________________
Soot
CO2
Water, heat and light
Everything given here
the outer zone of complete combustion is ________ in colour
Black
Blue
Purple
Yellow
orange
The minimum temperature at which a particular substance burns in the presence of (a) is called its ignition temperature..(in nb)
Write the chemical process that takes place in soda-acid fire extinguisher....(type the formula)
2NaHCO3 + H2SO4 ---> Na2SO4 + 2H2O + 2CO2
2NaHCO2 + H2SO4 ---> NaSO4 + 2HO + 2CO2
2NaHCO + H2SO4 ---> Na2SO4 + 2H2O
NaHCO3 + H2SO4 ---> NaSO4
what happens in the dark zone of the candle ??
Least hottest zone
Meted wax evaporates
Zone of no combustion
black in colour
What is fuel ??
Substance that produces heat and light energy on burning are called fuels
Kerosene,Diesel,petrol
Kilojoules / kilograms
none of the above
fuel can be (understand and give the answer)
Anything !!!!
nothing !!!
something !!!
of solid liquid and gases
helpful
why can't hydrogen be used as a domestic fuel
Not easily available
Too costly
Hard to transport
one false move in storing this thing and this thing will turn us into toast !!!
