Auto-ignition temperature is________?
Atemperature at which it solidifies or congeals
Bindicated by 50% distillation temperature
Cminimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
Dthat at which it catches fire without external aid
Eindicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
Correct answer
D. that at which it catches fire without external aid
Explanation
The correct answer is that at which it catches fire without external aid.