MEDIUM
8th CBSE
IMPORTANT
Earn 100

Name the various zones of a candle flame. Which zone (or part) of a candle flame is the least hot (or coldest)?

Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 44
Why does a goldsmith blow air into the kerosene lamp flame with a blow-pipe?
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 45
In which zone of a candle flame partial combustion of fuel takes place?
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 45
In which zone of a candle flame complete combustion of fuel takes place?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 46
Explain how, the use of CNG in automobiles has reduced pollution in cities.
HARD
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 47
What are the disadvantages of burning wood as fuel?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 48
Give reason for the following: LPG is a better domestic fuel than wood.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 49
Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after some time.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Short Answer Type Questions>Q 50
It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.