No student devices needed. Know more
15 questions
ignition temperature is
lowest temperature to catch fire
higher temperature to catch fire
any temperature
none of these
CNG and LPG are the examples of
solid fuels
liquid fuels
gaseous fuels
they are not fuels
Which one of the following gases is used in combustion?
hydrogen
oxygen
nitrogen
carbon dioxide
The burning of LPG is an example of
rapid combustion
spontaneous combustion
slow combustion
explosion
Which of the following is not a fossil fuel?
Petroleum
Natural gas
Coal
Water gas
the substances which have very low ignition temperature will
catch fire easily
will not catch fire
catch fire after sometime
none of these
like fuels, the sun also provides heat and light. the process taking place in the sun is called
all of these
combustion
nuclear process
burning
Which gas helps in the process of combustion?
Cooking gas
Nitrogen gas
Oxygen gas
Producer gas
what type of fire is this
home fire
forest fire
garbage fire
none of these
coal burns with
flame
only glow
both glow and flame
none of these
the substance which give heat and light after combustion are called
flame
fuel
combustion
none of these
fuel must be heated to its ____ before it starts burning
ignition temperature
heating temperature
boiling temperature
none of these
combustion is a
chemical process
physical process
both of these process
none of these process
burning of charcoal in a closed room will produce
carbon dioxide
nitrogen dioxide
carbon monoxide
all of these
on the basis of the combustion, classify the substance
combustible
non-combustible
both of these
none of these
Explore all questions with a free account