Question

which substance is present in fuel ..​

Answer 1

Explanation:

Primary (natural) Secondary (artificial)

Solid fuels wood, coal, peat, dung, etc. coke, charcoal

Liquid fuels petroleum diesel, gasoline, kerosene, LPG, coal tar, naphtha, ethanol

Gaseous fuels natural gas hydrogen, propane, methane, coal gas, water gas, blast furnace gas, coke oven gas, CNG

Answer 2

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Chemical

Primary (natural) Secondary (artificial)

Solid fuels wood, coal, peat, dung, etc. coke, charcoal

Liquid fuels petroleum diesel, gasoline, kerosene, LPG, coal tar, naphtha, ethanol

Gaseous fuels natural gas hydrogen, propane, methane, coal gas, water gas, blast furnace gas, coke oven gas, CNG

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