Question

all combustle substances are not fuels why​

Answer 1

Answer:

bcz :

they might burn with smoke

low calorific value

not storable

not affordable

high ignition temperature

Answer 2

Answer:

All combustible substances are not fuels because fuels are those combustible substances that can be used to run vehicles where as any other combustible substance cannot be used to run vehicles, they just give off heat and not enough energy to run vehicles .Jul 13, 2018