HARD
8th CBSE
IMPORTANT
Earn 100

Mention five characteristics of an ideal fuel.

Important Questions on Combustion, Flame and Fuels

MEDIUM
8th CBSE
IMPORTANT
A candle produces a yellow flame on burning while LPG burning in a gas burner produces a blue flame. Explain.
MEDIUM
8th CBSE
IMPORTANT
Why are water and sand used to extinguish fires?
MEDIUM
8th CBSE
IMPORTANT
How does carbon dioxide help in extinguishing a fire?
MEDIUM
8th CBSE
IMPORTANT

Study the details of the following fuels and select the best fuel out of them. Give reason.

Fuel Calorific Value Ignition Temperature
X 45,000 KJ/kg 350°C
Y 35,000 KJ/kg 750°C
Z 75,000 KJ/kg 750°C
MEDIUM
8th CBSE
IMPORTANT
What is the cause behind the colour change of the Taj Mahal from white to yellowish?
MEDIUM
8th CBSE
IMPORTANT
Classify the fuels on the basis of their source.
MEDIUM
8th CBSE
IMPORTANT
LPG is better domestic fuel than wood give reasons.
MEDIUM
8th CBSE
IMPORTANT
Give reasons why Goldsmiths use the outermost zone of the flame for melting gold and silver?