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प्रश्न
Name the process used to harness nuclear energy these days. Explain it briefly. List two advantages of using nuclear energy in place of fossil fuels.
उत्तर
Process used to harness nuclear energy is nuclear fission.
The nucleus of a heavy atom like uranium is bombarded with low energy neutrons, the heavy nucleus now spilts into lighter nucleii and tremendous amount of energy is released.
Advantages :
The fission of an atom of uranium produces 10 million times the energy produced by the combustion of an atom of carbon from coal.
Less use of fossil fuels implies lower emission of greenhouse gas.
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संबंधित प्रश्न
Write Einstein's mass-energy equation. Give the meaning of each symbol which occurs in it.
The following question are about the nuclear reactor of a power plant.
Is the energy produced by nuclear fission or nuclear fusion?
The following question are about the nuclear reactor of a power plant.
What is the purpose of using the graphite moderator?
In the reactor of a nuclear power plant, name the material which is used:
(a) as a moderator
(b) to absorb radiations
(c) in the fuel rods
(d) in the control rods
(e) to carry away heat
Which of the following is used as a moderator in the reactor of a nuclear power station?
(a) liquid sodium
(b) boron
(c) graphite
(d) carbon dioxide
Nuclear fission reactions are not a source of energy for one of the following. This is:
(a) atom bomb
(b) power plants
(c) sun
(d) pacemaker
Explain why, in a nuclear reactor, the chain reaction stops if the control rods are fully inserted into the graphite.
Complete the following fission reaction:
\[\ce{_92U^235 _0n^1 -> _aSb^133 + _41Co^b + 4_0n_1 + energy}\]
Write down the values of a and b.
An element 92U238 losses one alpha particle, and then one β-particle and then again one β- particle to get the final nucleus bQa.
(i) Write down the values of a and b.
(ii) State the relationship between the nuclei P and Q.
Analogy:
Kayatharu in Tirunelveli district:: Windmills.
Koodankulam in Tirunelveli district:: ______.
