MCQ
What does the blue zone in an $L.P.G.$ flame indicate?
- ✓Unburnt vapours.
- BPartial decomposition.
- CModerately hot.
- DHottest zone of complete combustion.
✓
Answer
Correct option: A.
Unburnt vapours.
The blue zone in $L.P.G.$ flame indicates the hottest zone where complete combustion takes place.
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