EASY
8th Jammu and Kashmir Board
IMPORTANT
Earn 100

Give reason, why water is not used to control fires involving electrical equipment?

Important Questions on Combustion and Flame

EASY
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 5
Give reason, LPG is a better domestic fuel than wood.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 5
Give reason, paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 6
Make a labelled diagram of a candle flame and name different zones of a flame.
EASY
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 7
Name the unit in which the calorific value of a fuel is expressed.
EASY
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 8
Explain how CO2 is able to control fires?
EASY
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 9
It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain. 
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 10
Which zone of a flame does a goldsmith use for melting gold and silver and why?
EASY
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 11
In an experiment 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.