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Cl8 Combustion

The document contains 30 multiple choice and short answer questions about combustion, flames, fuels and fire safety. Some key topics covered include: 1. Common fuels like gasoline and their combustion. 2. The difference between burning a candle versus coal and requirements for combustion like oxygen. 3. Examples of combustible versus non-combustible materials and the ignition temperatures needed. 4. Fire safety measures for controlling or extinguishing fires using water, CO2 or other methods depending on the type of fire.

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62 views1 page

Cl8 Combustion

The document contains 30 multiple choice and short answer questions about combustion, flames, fuels and fire safety. Some key topics covered include: 1. Common fuels like gasoline and their combustion. 2. The difference between burning a candle versus coal and requirements for combustion like oxygen. 3. Examples of combustible versus non-combustible materials and the ignition temperatures needed. 4. Fire safety measures for controlling or extinguishing fires using water, CO2 or other methods depending on the type of fire.

Uploaded by

deep_72
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Class 8 – Science – Combustion and Flame (Assignment Sheet)

Q 1 Name two fuels which are used for running automobiles.


Q 2 Define combustion.
Q 3 Write a difference between burning of a candle and the burning of coal.
Q 4 What do you understand by combustible substances or fuels?
Q 5 Is burning of magnesium combustion?
Q 6 Give two examples of non-combustible substances.
Q 7 What is essential for combustion?
Q 8 What do you mean by ignition temperature?
Q 9 Does a matchstick burn by itself?
Q 10 What is the composition of the head of the matchstick?
Q 11 Which type of pollution occurs on burning wood?
Q 12 Name a liquid fuel which is used in homes.
Q 13 Name the most common fire extinguisher.
Q 14 Which poisonous gas is produced due to incomplete combustion of a fuel?
Q 15 Name the substance used to extinguish fire involving electrical equipments.
Q 16 Why is food regarded as a fuel for our body?
Q 17 Write the full forms of-
(a) CNG (b) LPG
Q 18 When a burning charcoal piece is covered with a glass jar, it stops burning. Why?
Q 19 Which will catch fire first coal or kerosene?
Q 20 What are inflammable substances?
Q 21 What would you do when the clothes of a person catches fire?
Q 22 Explain how water control fires?
Q 23 How is CO 2 able to control fires?
Q 24 What do you understand by Explosion?
Q 25 Which zone of a flame does a goldsmith use for melting gold and silver and why?
Q 26 How can water boil in a paper cup without burning it?
Q 27 What are the three zones of a flame ? Draw a labelled diagram of a candle flame.
Q 28 Why does the matchstick start burning on rubbing it on the side of the matchbox?
Q 29 Give reasons-
(i) LPG is a better domestic fuel than wood.
(iii) Water is not used to control fires involving electrical equipment.
Q 30 Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe
does not.

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