Carbon content of pitch (residue of coal tar distillation) is around ________________ percent?
Correct answer: D. 94
- A. 70
- B. 55
- C. 80
- D. 94
Explanation
Coal-tar pitch is the carbon-rich residue left after distillation, with carbon content commonly taken as about 94 percent. The lower values are not the standard approximate composition used for pitch.
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