Worksheetscombustion,flame and fuels
Total questions: 21
Worksheet time: 42mins
_______________ is a chemical change.
combustion
flame
fuels
exothermic reaction
what are the two types of combustion ?
in-combustible
non-combustible
combustible
combustion
what are some examples of combustible substances ?
LPG
sand
coal
hydrogen
which of the following is a non-combustible substances ?
wood
coal
petrol
glass
combustion take place in the absence of oxygen. (true/false)
(a)
______ and ______ are always given out when combustion take place.
(a)
how much conditions are necessary for combustion to take place ?
2
3
5
1
which one of the following is a supporter of combustion ?
carbon dioxide
hydrogen
oxygen
nitrogen
which are the non-supporters of combustion ?
hydrogen
nitrogen
sand
air
how many types of combustion are there ?
3
1
2
4
slow combustion reaction takes place slowly. (true/false)
(a)
what are the different types of combustion ? (pick any 4 out of 5)
spontaneous combustion
explosion
rapid combustion
slow combustion
loud combustion
which one of this is a example of slow combustion ?
digestion of food
bomb
firecrackers
LPG
substances which do not burn or catch fire in the presence of oxygen is called (a) .
which of this is a part of candle ? (pick any 3)
non-luminous zone
dark zone
light zone
luminous zone
what are the two types of fuel on the basis of source
gaseous fuels
secondary fuels
primary fuels
renewable fuels
what are two types of fire extinguisher :
soda-acid fire extinguisher
oxygen fire extinguisher
nitrogen extinguisher
carbon dioxide fire extinguisher
(a) gas is responsible for about 87% of global warming.
carbon monoxide is a highly poisonous gas. (true/false)
(a)
the SI unit of calorific value of a fuel is _____________.
J/KG
KJ/KG
K/KG
KJ/J
which of the following is not a primary fuels
animal dung
wood
coal
charcoal
