Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ?
Correct answer: D. Smoking tendency of paraffins increases with decrease in its molecular weight
- A. Smoking tendency of hydrocarbons increases in the order: paraffins → isoparaffins →
- B. naphthenes → aromatics
- C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on
- D. Smoking tendency of paraffins increases with decrease in its molecular weight
- E. addition of double bond
- F. Smoking tendency of aromatics decreases with increase in its molecular weight
Explanation
The wrong statement is that paraffin smoking tendency increases as molecular weight decreases; it generally increases with increasing molecular weight, as longer-chain paraffins burn more smokily. Aromatic hydrocarbons normally have a greater smoking tendency than paraffins.
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