Draw a well labeled diagram of the flame of a candle and answer the followingQuestions:
(a) Which zone is luminous and why ?
(b) Why is the innermost zone grey in colour and the coldest zone ?
(c) Which zone is called the zone of complete combustion and why?
(d)Which zone is called the zone of incomplete combustion and why ?name the products formed.
Answers
Answer:
a ka answer the uppermost zone
b=center or middle most zone
c=lowermost zone
a. Thus, the central zone of the candle flame is luminous due to the incomplete combustion temperature. Inner dark zone of no combustion : The dark zone around the wick is called inner dark zone of no combustion. In this zone very little or no combustion takes place because in this zone no air is present.
b. In the inner most zone of candle flame, the wax vapours donot burn due to deficiency of oxygen supply as this zone is not at all in contact with air. No combustion takes place in this zone. Hence it is dark and low in temperature
c. The outermost zone is called the zone of complete combustion. The non-luminous zone is the region of complete combustion. This is because a non-luminous flame gets much more oxygen and gets much hotter.
d. This zone is bright yellow and luminous, and lies below the outermost non luminous zone. In this zone, wax vapour undergoes incomplete combustion because not enough of air is present here. The incomplete combustion of wax vapour produces carbon particles.
Miss phenomenal