CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
A device used to extinguish fire is called a __________ .
fire extinguisher
When a fuel burns in the presence of limited air, a __________ flame is produced.
luminous
The __________ zone of the candle flame is hottest.
outermost
The non-luminous zone is _________ than luminous zone.
hotter
A burning substance will be extinguished if its temperature falls below its _________ temperature.
ignition