Question

what is the main component of CNG and LPG

Answer 1

hydrogen monoxide and methane gas
may be the answer

Answer 2

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CNG (Compressed Natural Gas) is composed primarily of methane, but may also contain ethane, propane and heavier hydrocarbons. Small quantities of nitrogen, oxygen, carbon dioxide, sulfur compound
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LPG is a mixture of propane and butane. The composition is determined by the geography you live in.

In colder nations, LPG will be a propane rich product. This is because the boiling point of propane is -42 Deg C and in cold countries like Scandinavian countries, where the temperature can go to -10 Deg. C and -12 Deg. C LPG will still remain a liquid as it’s a propane rich product. In tropical countries like India, LPG is a butane rich product. This is because butane has a higher boiling point (-1 Deg.C).

Therefore the temperature of the country will determine the main component of LPG.
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