Which of the following is used as a reducing agent in the extraction of iron metal?
  1. coal
  2. bitumen
  3. charcoal
  4. coke


Correct Answer:  D. coke

Explanation: Coke is a tough, porous and black substance. It is almost pure form of carbon. It is used as a reducing agent in the extraction of metals.

Updated on: 10-Oct-2022

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