Why does a phuljhari (sparking light) require some heating before it sparks ?
Phuljhari requires some heating before it sparks to attain its ignition temperature.
What are inflammable substances ?
The substances which have very low ignition temperature and can catch fire easily with a flame are called inflammable substances.For example methane gas, LPG, etc.
Mention three examples of inflammable substances.
Petrol, alcohol and LPG etc.
Which has a lower ignition temperature–kerosene or LPG ?
LPG has lower ignition temperature.