MCQ
Aromatic compounds burn with sooty flame because
- AThey have a ring structure of carbon atoms
- BThey have a relatively high percentage of hydrogen
- ✓They have a relatively high percentage of carbon
- DThey resist reaction with oxygen of air
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(Use molar mass of aluminium as $27.0 g mol ^{-1}, R =0.082 atm L mol { }^{-1} K ^{-1}$ )

