1) What do you understand by the term
Renewable source of energy ? support your answer by
at least
four examples.
2) What are Non Renewable source of Energy?
Support your answer by two examples.
3) How does solar energy change into
chemical energy of Biomass?
4) Answer the following questions regarding
the box type cooker.
a) Why is its interior painted black?
b) Why is it covered with a double plane glass
lid?
c) Why is a plane mirror reflector used?
d) What is the optimum temperature obtained by
the cooker?
e) State its any two advantages.
f) State its any two limitations.
5) Briefly describe the construction of a
photovoltaic cell. State any two uses of the cell.
6)a) state three common uses of
wind energy
b) How
wind energy harnessed in the form of electric energy?
7) State two advantages and two disadvantages
of hydel power
8) a) How is nuclear energy released by
the fission process? How is this energy converted into
electrical energy?
b) State
two limitations of Nuclear power plants.
9) Answer the following questions
regarding the biogas plants.
a) Name the raw materials used
inthis palnts.
b) What type of chemical reaction
takes place within the plant? Define the chemical reaction.
c) What is slurry?
d) State the two conditions due to which the
slurry changes to biogas.
e) Why
do we prefer biogas , to burning dry biomass?
f)
What is the approximate composition of biogas?
10. a) what is polluted air?
b) How
is air polluted by the activities of man?
c) Name five major pollutants in air. State
the harm they can cause to living beings.
11.a) State one way
of reducing air pollution in various activities at home.
b) Sate
one way of reducing pollution of air by big industrial units.
c) State two ways of reducing air
pollution caused by automobiles.
