Which material is called black gold? why?
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Black gold is a term applied to oil or petroleum, which is black when it comes out of the ground and is worth a great deal of money. Prior to the mid-19 th century, oil from animal tallow (fat) and whale blubber was used as a lubricant and fuel.
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Answer:
(1) Hydrocarbon
(2) Coal
(3) petroleum
(4) Ether.
It is black in colour when crude oil is extracted from the soil. Because of its oil and worth, people call it gold.
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