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2. Coal is mainly composed of(a) oxygen(b) carbon dioxide3. Petroleum is a mixture of(a) hydrocarbons(b) gases(c) carbon(c) rocks and soil |
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Answer» answer(2)---opction (c) is correct answer .answer(3)--- option (b) is correct answer. 2) carbon3) hydrocarbons 2 answer - Carbon 3 answer - Hydrocarbons |
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