Which one is a pure carbon?
Correct answer: C. Coke
- A. Coal Tar
- B. Coal gas
- C. Coke
- D. None of These
Explanation
Coke is the solid carbon-rich residue obtained by destructive distillation of coal and contains mostly carbon. The likely wrong choice is coal tar, but coal tar is a mixture of liquid aromatic organic compounds rather than a nearly pure carbon residue.
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About Alkanes
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
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