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Because of its great commercial importance, petroleum is also called:
AEarth blood
BRock silver
CBlack gold
DLiquid iron
Answer & Solution
Correct answer: C. Black gold
1. It is a dark oily liquid.
2. It is nicknamed black gold.
3. Refining separates its fractions.
_Source: NCERT Class 8 Science, Chapter 5, Coal and Petroleum._
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