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Combustion and Flame - Science Class 8 | Shiksha Nation
Q&A Home
Class 8
CBSE
Science
Combustion and Flame
🔬
Chapter 4
Combustion and Flame
Science
•
Class 8
•
CBSE
14 Questions Available
Showing 14 questions on this page
1
State the difference between burning of a candle and burning of a fuel like coal
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2
Why does the matchstick start burning on rubbing it on the side of matchbox?
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3
It is observed at petrol pumps and airports, that hydrocarbon fire extinguishers are used, instead of soda-acid fire extinguisher. Give reasons why.
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4
What do you mean by ignition temperature? Why a matchstick dose not catch fire on its own at room temperature?
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5
Explain how water gets boiled in paper cup without burning it.
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6
Why does a piece of paper burn with yellow flame? Give a reason.
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7
What is forest fire?
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8
What is acid rain? Write its effects.
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9
Why isn’t hydrogen gas used as a domestic or industrial fuel, although it has a very high calorific value? State three reasons for the answer.
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10
When the clothes of a person catch fire, the person is covered with a blanket to extinguish fire, explain why?
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11
On putting glass over a lighted candle, the candle flame flickers and produce smoke, why so?
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12
Food is a fuel for the body. Justify this statement.
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13
Explain combustion and combustible along with examples.
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14
Explain complete combustion.
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