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प्रश्न
What is nuclear energy? Name the process used for producing electricity using the nuclear energy.
उत्तर १
When a heavy nucleus is bombarded with slow neutrons, it splits into two nearly equal light nuclei with a release of tremendous amount of energy. In this process of nuclear fission, the total sum of masses of products is less than the total sum of masses of reactants. This lost mass gets converted into energy. The energy so released is called nuclear energy.
Principle: The heat energy released due to the controlled chain reaction of nuclear fission of uranium-235 in a nuclear reactor is absorbed by the coolant which then passes through the coils of a heat exchanger containing water. The water in heat exchanger gets heated and converts into steam. The steam is used to rotate the turbine which in turn rotates the armature of a generator in a magnetic field and thus produces electricity.
उत्तर २
Nuclear energy is the energy released by the atom’s nucleus during a nuclear reaction. It is an exothermic process. The process of Nuclear fission is used to produce electricity.
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संबंधित प्रश्न
What is a fuel? Give five examples of fuels.
Fill in the following blank with suitable word:
In a nuclear power station, nuclear fission takes place in the .............
What is nuclear fission? Explain with an example. Write the equation of the nuclear reaction involved.
The following question are about the nuclear reactor of a power plant.
Why is liquid sodium (or carbon dioxide gas) pumped through the reactor?
how is heat removed from the reactor core, and what use is made of this heat?
Which produces more energy : nuclear fusion or nuclear fission?
One eV (electron volt) of nuclear energy is equivalent of:
(a) 1.6 × 10−14 J
(b) 1.6 × 10−12 J
(c) 1.6 × 10−19 J
(d) 1.6 × 10−13 J
Which of the following can be produced during the nuclear fission as well as nuclear fusion reactions?
(a) protons
(b) deutrons
(c) electrons
(d) neutrons
Make the correct choices in the following:
(a) In one atom of copper (mass number 63, atomic number 29) there are
Which of the following statements are correct?
Electrons have
Write the approximate mass of a proton, neutron and electron in a.m.u.
When an alpha particle gains two electrons it becomes neutral and becomes an atom of an element which is a rare gas. What is the name of this rare gas?
The nucleus B emit a β-particle and is transformed into nucleus C. What is the composition of C?
What precautions must be taken for the safe disposal of nuclear waste?
A certain nucleus X has a mass number 14 and atomic number 6. The nucleus X changes to `"_7Y^14` after the loss of a particle. Represent this change in the form of an equation.
A certain nucleus X has a mass number 15 and atomic number 7. Find the number of neutrons. The nucleus X losses one β-particle and Express the change and write the symbol of the new nucleus.
An isotope of uranium is 92Y238, i.e., it has mass number 235 and atomic number 92.
What is the number of protons in 92U238?
Give scientific reason.
It is absolutely necessary to control the fission reaction in nuclear power plants.
Copy and complete the nuclear reaction by filling in the blanks.
\[\ce{_92U^235 + _0n^1 -> _56Ba^{\underline{\phantom{....}}} + \underline{\phantom{..}}Kr^92 + 3 _0n^1}\]
