Question

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Fill in the blanks.
1. The zone that produces light in a candle flame is called the __ zone.
2. The unburnt carbon particles escaping from a candle flame form a black,
powdery substance called –
3. The amount of heat evolved, in joules, when one kilogram of fuel is burnt
completely, is called the value of the fuel.
4. Combustion can lead to the formation of ___ dioxide and oxides of -
can lead to the melting of polar ice.​

Answer 1

1. outermost

2. soot

3.40000

4.carbon monoxide