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Question

Match the column
Directions: Match Column – I with Column – II and select the correct answer using the codes given below the columns

ColumnIColumnIIA. Hottest zone of candle flameP. No combustion zoneB. Dark zone of candle flameQ. Zone of unburnt wax vapoursC. Yellow zone of candle flameR. Non-luminious zoneD. Black innermost zone of candle flameS. Incomplete combustion zone


A

AP,BQ,CR,DS

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B

AR,BP,CS,DQ

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C

AS,BR,CQ,DP

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D

AQ,BP,CR,DS

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Solution

The correct option is B

AR,BP,CS,DQ


The outermost zone is the hottest among all zones and is blue in colour, and this is due to complete combustion. It is the non-luminous part of the flame.
The middle zone of the candle flame is moderately hot and is yellow in color, and partial combustion of fuel takes place. It is the bright part of the fire.
The innermost zone of the flame is the least hot and is black in color. This is due to the presence of unburnt wax vapours.


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