Type of flame depends upon the amount of oxygen available
Invisible zone of a flame is the least hot zone
Blue zone indicates complete combustion of fuel
A
Type of flame depends upon the amount of oxygen available
B
Flame can be seen over burning solids and liquids
C
Invisible zone of a flame is the least hot zone
D
Blue zone indicates complete combustion of fuel
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Solution
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The invisible zone of the flame is also called a non-luminous zone which is the zone of complete combustion. Due to complete combustion, the zone becomes the hottest zone of the flame. Hence option C is correct.
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