Question

1. What are the characteristics of middle zone of candle? why do all
substances not produce flame? How will you prove that air is
essential for combustion to take place?​

Answer 1

Answer:

the middle zone of the flame is luminous and yellow in color and it is moderately hot

Answer 2

Explanation:

Yes , it is correct that air is necessary for combustion you can take example of a candle . that a candle does not burn when we put it under the glass where as it keeps burning when it is not covered with glas s