Q12 of 87 Page 105

Name one fuel which burn without producing a flame.

Charcoal does not vaporize and so does not produce a flame.


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10

Name one solid, one liquid and one gas which burn by producing a flame.

 11

Which of the following does not produces a flame on burning?

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How many Zones are there in a flame?

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Which zone of a candle flame is the hottest?