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What does the word petrochemicals signify?

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What does the word petrochemicals signify?

(a) Chemicals based on coal

(b) Chemicals based on rocks

(c) Chemicals based on atmospheric conditions

(d) Chemicals based on fertility

I got this question in final exam.

Query is from Petrochemicals topic in portion Fuels and Combustion of Engineering Chemistry II

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The correct option is (b) Chemicals based on rocks

For explanation: The term “petrochemicals” means “chemicals based on rocks”. It refers to the chemicals and chemical products manufactured from raw materials derived from petroleum and its fraction as well as natural gas.

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