EASY
8th CBSE
IMPORTANT
Earn 100

Name the unit in which the calorific value of a fuel is expressed.

Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 7
Which of the following fuels has the lowest calorific value? (Diesel, methane, CNG, coal, petrol)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 8
Which of the following fuels has the highest calorific value?
kerosene, wood, hydrogen, cow-dung cakes, LPG.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 9
Name the term which is used to express the efficiency of a fuel.(Calorific value/specific value)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 10
Name one solid, one liquid and one gas which burn by producing a flame.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 11
Which of the following does not produce a flame on burning?
Camphor, Charcoal, Kerosene.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 12
Name one fossil fuel(one of the source of carbon) which burns without producing a flame.
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 13
How many zones are there in flame? (answer should be in number).
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 6 - Combustion and Flame>Very Short Answer Type Questions>Q 14
Which zone of a candle flame is the hottest?