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WorksheetsSania Chemistry Chapter 3
Total questions: 15
Worksheet time: 8mins
Which of the following options most accurately defines combustion?
An exothermic chemical reaction in which a substance combines with hydrogen
An endothermic chemical reaction in which a substance combines with oxygen
An exothermic chemical reaction in which two combustible substance combine with each other
An exothermic chemical reaction in which a substance combines with oxygen
Which 3 elements form the fire triangle?
Oxygen,Heat,Fuel
Hydrogen,Heat,Fuel
Oxygen,Heat,Flame
Oil,Heat,Fuel
According to Mohammed, combustion can occur and a fire can be lit by using any of the two elements from the fire triangle. Is he correct?
No, as any one element is enough
No, as all three elements are necessary
Yes, any two elements are enough to light a fire
Choose all the combustible substances from the list below
Petrol
Methane
Marble
Wood
Hydrogen
Substance which have a very low ignition temperature will_____?
catch fire easily
not catch fire
catch fire after some time
burn with a blue flame
This type of combustion occurs when there is a limited supply of oxygen
Complete Combustion
Incomplete Combustion
Which part of the flame is the arrow pointing at?
Blue zone, Where carbon monoxide burns
Dark zone, least hot zone
Luminous zone, or zone of incomplete combustion
Non-luminous zone or zone of complete combustion
Which part of the flame is the arrow pointing at?
Blue zone, Where carbon monoxide burns
Dark zone, least hot zone
Luminous zone, or zone of incomplete combustion
Non-luminous zone or zone of complete combustion
Which part of the flame is the arrow pointing at?
Blue zone, Where carbon monoxide burns
Dark zone, least hot zone
Luminous zone, or zone of incomplete combustion
Non-luminous zone or zone of complete combustion
Which part of the flame is the arrow pointing at?
Blue zone, Where carbon monoxide burns
Dark zone, least hot zone
Luminous zone, or zone of incomplete combustion
Non-luminous zone or zone of complete combustion
Does combustion always result in a flame?
Yes
No
Which of the following fuel has the highest calorific value?
Wood
Coal
Petrol
Hydrogen
Which of the following fire extinguishers are most suitable for an electric fire?
Which of the following fire extinguishers are most suitable for an cooking oil fire?
What does the "PASS" acronym stand for
Push, Activate, Squeeze, Switch
Pull, Aim, Squeeze, Shower
Pull, Aim, Squeeze, Sweep
Press, Activate, Squeeze, Sweep
