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Question

Which amongst the following is not free state of carbon?
  1. Diamond
  2. Graphite
  3. Coke
  4. Petrol

A
Petrol
B
Diamond
C
Graphite
D
Coke
Solution
Verified by Toppr

The correct option is D Petrol
Diamond, graphite, and coke exist in the free state of carbon whereas petroleum is the mixture of hydrocarbons where carbon and hydrogen are present. So the substance which is not available in a free state is petrol.
Hence, option D is correct.

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