Question

the material which produce heat energy on burning in __________ are called __________​

Answer 1

Answer:

oxygen, combustible substance

Answer 2

Explanation:

the materials which produce heat energy on buring in air are called fuels .

example

charcoal , wood ,petrol , LPG ,kerosene etc .

characteristics of good fuel;

1. it should be easy to store .
2. it should have low ignition temperature.
3. it should have high calorific value .
4. it should be cheap .

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