Burning of a matchstick is an example of a __________.
Slow Combustion
Rapid Combustion
Spontaneous Combustion
None of these
Arrange the following in terms of their increasing fuel efficiency
i) Wood,ii) Coal,iii) LPG, iv) Diesel
i < ii < iv<iii
ii < i < iv < iii
iii < iv < ii < i
iv < iii < ii< i
The substances which have very low ignition temperature and can easily catch fire with a flame are called
Ignition temperature
Rapid combustion
Inflammable substances
Global warming
The efficiency of the fuel is judged by its _________.
Calorific value
Burning time
Energy generated
___________ zone is the least hot and non-luminous.
Innermost zone
Middle zone
Outermost zone
Wax zone
burning substance will be _____ if the temperature falls below its ignition temperature.
extinguished
burning brightly
burning dimly
burning with smoke
A ____________ is one which is readily available, cheap and burns easily in air at a moderate rate
Good fuel
Ideal fuel
Liquid fuel
Solid fuel
_______ and _______ are non- combustible substances
Sand
Glass
Both a and b
The amount of energy released on complete burning of 1kg of a substance is called
Heat capacity
Ignition value
Combustibility
_________ fuels gets exhausted over a period of time.
Non-renewable
Renewable
Primary
Secondary
