Question

what are obtained from fuels by various physical and chemical process​

Answer 1

Answer:

petrol

Explanation:

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Answer 2

Answer:

Secondary fuels

Explanation:

These fuels are derived from natural fuels by various physical or chemical processes. Therefore, they are also called secondary fuels. For example, charcoal, coke, petrol, diesel, kerosene, water gas, coal gas, etc, are processed or manufactured secondary fuels.