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प्रश्न
Write the merits of nuclear energy.
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उत्तर
A nuclear power plant does not use fossil fuel like coal. Therefore, problems like air pollution do not arise.
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संबंधित प्रश्न
State whether the fission of uranium-235 is caused by low energy neutrons or high energy neutrons.
What is the source of energy of the sun and other stars?
Name five places in India where nuclear power plants are located.
The disposal of waves produced in a nuclear power plant poses a big problem because it is:
(a) too heavy
(b) highly inflammable
(c) extremely foul smelling
(d) highly radioactive
The heat energy released during nuclear fission and fusion is due to the:
(a) conversion of stored chemicals into energy
(b) conversion of momentum into energy
(c) conversion of mass into energy
(d) conversion of magnetism into energy
Which of the following can undergo nuclear fusion reaction?
(a) uranium
(b) deuterium
(c) barium
(d) krypton
A nuclear reactor has half the length of all its control rods inserted in graphite. What must be done so that the reactor produces more heat? Explain your answer.
Explain why, in a nuclear reactor, the chain reaction stops if the control rods are fully inserted into the graphite.
One isotopes of uranium has a mass number of 235 and atomic number 92.
(a) What is the number of electrons in a neutral atom of this isotope?
(b) How many protons are there in the nucleus of this isotope?
(c) For another isotope of Uranium state which one of the numbers (238 or 92) changes?
(d) What is the number of protons in 238U?
Distinguish between α, β and γ rays.
The nucleus 84X202emits an alpha particle and forms the nucleus Y. Represent this change in the form of an equation.
What will an alpha particle change into when it absorb one electron.
How does the position of an element change in the periodic table when it emits out a beta particle?
The nucleus of an atom does not contain electrons. Explain how is it possible for the nucleus to emit a beta particle which is fast moving electron.
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.
Define.
Nuclear fission
Complete the following nuclear changes:
\[\ce {^238_92 P ->\underset{-}-{Q} + ^4_2He->\underset{-}-{R} + ^0_-1e}\]
Why is nuclear fission useful to mankind?
