NEW
Font size
WorksheetsCombustion, Flames and Fuels.
Total questions: 11
Worksheet time: 2mins
Which of these can be used in case of an electric fire?
Water
Soda-acid fire extinguisher
Carbon di oxide fire extinguisher
Sand
Which poisonous gas is formed as a result of incomplete combustion?
Coal gas
Carbon di oxide
Carbon monoxide
Nitrogen dioxide
Which of the following method can be used to extinguish a flame?
Reduce temperature below the ignition temperature
Remove combustible substance
Cut off air supply
All of them
Which of the following is not a primary fuel?
Animal dung
Charcoal
Wood
Coal
What is the colour of a luminous flame?
Blue
Black
Yellow
Red
Complete combustion takes place in the presence of air.
True
False
Substances that catch fire easily in the presence of water are call flammable substances.
True
False
The flame of a bunsen burner is blue when the air hole is clogged, and it does not get sufficient supply of oxygen
True
False
Temperature at which a substances catches fires and starts burning is called ignition temperature.
True
False
LPG is a liquid fuel.
True
False
Carbon monoxide has lesser affinity to haemoglobin than oxygen
False
True
