Draw a diagram to explain that air is essential for combustion.
(b) The flame flickers and produces smoke because there is no air in case.
(c) In case flame finally goes off because air is not available.
Explain various harmful effects of burning fuels.
What are different types of combustion?
Explain why, fire caused by electricity should not be extinguished by pouring water.
Describe how green house effect may cause atmospheric heating ? Name any two atmospheric constituents responsible for it.
