Combustion and flame class 8 science

Front

The lowest temperature at which a substance catches its fire is called

Back

Ignition temperature

Front

The main constituents of bio gas is-
Options: Butane, Methane, Nitrogen, Ethane

Back

Methane

Front

The types of combustion in which a material suddenly burst into flames is called-

Back

Explosion

Front

The----------zone in a candle flame is the zone of no combustion

Back

Dark zone

Front

Which is the hottest part in the flame of the candle?

Back

Blue

Front

Incomplete combustion gives

Back

Carbon monoxide

Front

The quantity of heat produced by a unit mass of a fuel on complete combustion is called-

Back

Calorific value

Front

Which of the fuel has highest calorific value? Options: Wood, CNG, LPG, Petrol

Back

CNG

Front

The substances which have very low ignition temperature and can easily catch fire are called

Back

Inflammable substances

Front

Which gas in atmosphere is responsible for global warming?

Back

Carbon dioxide