Which of the following is a noncombustible substance?
Coke
Diamond
Coal
Wood
The heat supplied to the paper cup is transferred to water by
Conduction
Oxidation
Convection
Insulation
The amount of heat energy produced on complete combustion of 1kg of a fuel is called its
Calorific value
Efficiency
Heat capacity
Specific heat capacity
Certain substances burn rapidly and produces heat and light. Such combustion is known as
Slow combustion
Rapid combustion
Good combustion
Complete combustion
Which of the following poisonous gas is produced as a result of incomplete combustion?
Carbon monoxide
Carbon dioxide
Oxygen
Hydrogen
The substances which vaporize during burning gives
Heat
Flame
Carbon
Which of the following gas produced can kill persons sleeping in a closed room where coal is burning?
The type of combustion in which a material suddenly bursts into flames, without the application of any apparent cause is called
Burning
Spontaneous combustion
In which reaction, a large amount of gas is formed?
Combustion
Explosion
How heat and light are produced in Sun?
Nuclear reaction
Substitution reaction
Thermal cracking
