Question

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


NCERT Class VIII
Science - Exemplar Problems

Chapter 6. Combustion and Flame

Answer 1

The petrol will catch fire instantly.Petrol has low ignition temperation and high calorific value as compared to milk and mustard oil.
Therefore, out of these given three liquids, petrol will burn instantly producing a large amount of heat as well as light.

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Answer 2

Answer:

petrol

Explanation:

petrol will catch fire easily as it has low ignition temperature and high calorific value as compared to milk and mustard oil