GK
BASIC GENERAL KNOWLEDGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Coal
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Opium
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Iron
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Petroleum
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Detailed explanation-1: -Petroleum is also known as Black Gold-because when crude oil is extracted from the land it is black in color. People call it gold because of its oils and value. It is very difficult to find.
Detailed explanation-2: -Petroleum, also called crude oil, is a fossil fuel.
Detailed explanation-3: -Coal is known as Black diamond because coal is a basic need in India for the thermal power plants. The thermal power plants produce more than half of the energy requirement of India.
Detailed explanation-4: -A traditional crude oil, containing alkanes (straight carbon chains) of C5 to C30+ liquids. Black oils consist of a wide variety of chemical species including large, heavy, nonvolatile molecules. The phase diagram predictably covers a wide temperature range.