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Zones of Candle Flame

The flame of ...

Question

The flame of a Kerosene on lamp (or lantern) has :

(a) single zone

(b) two zones

(c) three zones

(d) four zones

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Solution

(c) three zones

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Similar questions

Q. The flame of the candle has three zones. The outer zone is blue, the middle zone is yellow and the inner zone is black. Which is correct regarding this?

Q. Which zone in a candle flame gives out the maximum light?
(a) dark zone
(b) non-luminous zone
(c) blue zone
(d) luminous zone

Q. The hottest zone of a candle flame is
(a) non-luminous zone.
(b) luminous zone.
(c) dark zone.
(d) blue zone at the base of the wick.

Q. Match Column I with Column II and select the correct option from the codes given below.

	Column I		Column II
(a)	Hottest zone of a candle flame	(i)	Zone of unburnt wax vapours
(b)	Yellow zone of a candle flame	(ii)	Non-luminous zone
(c)	Black innermost zone of the candle flame	(iii)	Incomplete combustion zone

Name the various zones of a candle flame. Which zone (or part) of a candle flame is the least hot (or coldest) ?

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Standard VIII Chemistry

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