MEDIUM
8th CBSE
IMPORTANT
Earn 100

Which of the following zone is the hottest part of the flame?

18.18% studentsanswered this correctly

Important Questions on Combustion and Flame

EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 5
Which of the following has the highest calorific value?
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 6
Which gas is released from the exhaust of vehicles due to incomplete burning of fuel in the engine?
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 2
_____ substances have ignition temperatures lower than 100 C∘.
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 3

In _____ combustion, the material has an internal supply of oxygen. (slow/ explosive/ rapid)

EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 4
A fire that is caused by oil or combustible gases can be extinguished by using a _____ extinguisher.
EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 5
_____ is an area of burning gases.
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 6
In the _____ zone, partial combustion of wax vapour takes place and a lot of heat energy releases.
 
EASY
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 7 - Combustion and Flame>EXERCISE>Q 7
Higher the _____ value higher the amount of heat produced by the fuel.