EASY
8th Jammu and Kashmir Board
IMPORTANT
Earn 100

It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain. 

Important Questions on Combustion and Flame

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.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 12
Can the process of rusting be called combustion? Discuss.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS 8>Chapter 7 - Combustion and Flame>Exercises>Q 13
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?