Question

write any two conditions necessary for combustion

Answer 1

Three things are requiredin proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Heat (ignition temperature) to start and continue the combustion process.

Answer 2

The 2 conditions for combustion to take place are as follows :-

(i) Flammable environment or presence of air or oxygen.

The first condition should be the presence of a flammable environment. Only then will the substance catch fire .

(ii) Ignition temperature .

The minimum ignition temperature should be crossed in order to catch fire.

For example : paper would not catch fire if the ignition temperature of paper is not sufficient .

These are the conditions for combustion to take place.