Question

You are provided with three watch glasses containing milk, mustard oil, and petrol respectively. Suppose you bring a burning candle near this one by one, which material will catch fire instantly and why?

Answer 1

Ignition temperature is the minimum temperature at which a substance can easily catch fire.

Inflammable substances are those substances with low ignition temperature which makes them easy to catch fire are known as inflammable substances

If a burning candle is bought near milk, mustard oil, and petrol, the petrol will catch fire instantly as it is a highly volatile liquid that has low ignition temperature thus making it highly inflammable as compared to the other two liquids.