MEDIUM
8th CBSE
IMPORTANT
Earn 100

Why is hydrogen not used as a domestic fuel even though it has the highest calorific value?

Important Questions on Combustion and Fossil Fuels

HARD
8th CBSE
IMPORTANT
OXFORD New Science In Everyday Life 8>Chapter 5 - Combustion and Fossil Fuels>LET'S APPLY
Mitali and John purchased gas stoves from a shop both of which were of the same type. After a month of use, they found that Mitali’s stove produces a yellow flame, while John’s stove produces a blue one. Who needs to clean the burner of the stove? Why?
MEDIUM
8th CBSE
IMPORTANT
OXFORD New Science In Everyday Life 8>Chapter 5 - Combustion and Fossil Fuels>LET'S DISCUSS
Are fossil fuels a boon or a curse? Discuss.
MEDIUM
8th CBSE
IMPORTANT
OXFORD New Science In Everyday Life 8>Chapter 5 - Combustion and Fossil Fuels>LET'S OBSERVE
Look at the picture given below. It shows different colours of the flame with change in oxygen supply. Number them in correct order from 1 to 4 according to increase in oxygen supply.
C:\Users\pk\Desktop\Colour of flame.PNG