Question

combustible suestance
B. Fill in the blanks.
1. The substances that catch_____ fire easily are called
substances.
2._____ has a high calorific value.
3.
______is added to the sodium bicarbonate solution to produce a foam of carbon
dioxide.
4. Complete combustion of wax vapour takes place in______ zone of a candle flame.
5.
______of the fuel is the heat liberated when one kilogram of fuel burns
completely in oxygen.
6.
_____&are obtained from fuels by various physical and chemical processes.
7. The
_______zone in a candle flame is the zone of no combustion.
8. The outermost zone of the candle flame is called_____
zone.
9. During an explosion, a large amount of______ is given out.
10. Most fuels are made up
of______and_____
​

Answer 1

1. combustible substances

2. LPG

3. Lime water

4. Middle zone

5. Calorific value

6. Petrol

7. Inner dark zone

8. nonluminous zone

9. Heat & energy

10. Carbon & Hydrogen

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