Advertisements
Advertisements
Question
When the material A mined from the earth is heated strongly in an insufficient supply of air, it produces a solid fuel B which consists mainly of carbon. When another material C obtained from trees is heated in an insufficient supply of air, it produces another solid fuel D which also consists mainly of carbon. Name A, B, C and D
Solution
A: Coal (mined from the earth)
Coal is mined from the earth.
B: Coke. It consists mainly of carbon.
C: Wood. It is obtained from trees.
D: Charcoal. It consists mainly of carbon.
APPEARS IN
RELATED QUESTIONS
Why are we looking at alternate sources of energy?
What are fossil fuels? Give three examples of fossil fuels.
The aviation fuel which is used in the engines of jet aeroplanes is:
(a) diesel
(b) kerosene
(c) petrol
(d) CNG
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
Name the substance X.
Name the biomass which is still widely used as a source of heat energy in many household of our country.
What type of nuclear reaction is responsible for the liberation of energy:
in the sun?
Answer the following question.
Write the name of the main constituent of Biogas. Also, state its percentage.
Name the major constituent of natural gas.
What are the environmental consequences of using fossil fuels? Suggest the steps to minimise the pollution caused by various sources of energy including non-conventional sources of energy.
Write True/False against the following statement.
Wildlife is an exhaustible natural resource.
