Question

arrange Oxygen gas ,petroleum , charcoal and petrol descending order of density

Answer 1

Answer:The sources of heat energy for domestic and industrial purposes are mainly wood, charcoal, petrol, kerosene, etc. These substances are called fuels. A good fuel is one which is readily available. It is cheap. It burns easily in air at a moderate rate. It produces a large amount of heat. It does not leave behind any undersirable substances.

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Answer 2

Answer:

Charcoal > petroleum/petrol > oxygen gas

Explanation:

Since petrol and petroleum are the same thing, their density is obviously the same