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प्रश्न
In nuclear power plants, the chain reaction cannot be controlled.
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
The calorific value and ignition temperature of fuel A are 55 kJ/g and 80°C, respectively. These values for fuel B are 80 kJ/g and 10°C, respectively. On burning, the fuel A produces CO2 and H2O while the fuel B produces CO2 , CO and SO2. Give three points of relative and disadvantages of these two fuels.
Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with highest calorific value first):
Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane
Name the type of nuclear reaction which is involved in the working of:
an atom bomb.
Of what material are the control rods of a nuclear reactor made?
What do you think is the purpose of the thick, concrete chamber surrounding the reactor of a nuclear power plant?
The following question are about the nuclear reactor of a power plant.
What is the function of boron rods in the nuclear reactor?
The control rods used in the reactor of a nuclear power plant are made of:
(a) steel
(b) graphite
(c) uranium
(d) boron
A nuclear reaction is represented by the equation:
`""_1^2H+_1^2H->_2^3He+xc+E`
What does E represent?
List any four characteristics of a good fuel.
Explain with a diagram the step-by-step energy conversion in a nuclear power plant.
Which of the following statements are correct?
Electrons have
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?
'Radioactivity is a nuclear phenomenon'. Comment on this statement.
The isotope of 92U235 decays by alpha emission to an isotope of Thorium (Th). The Thorium isotope decays by beta emission to an isotope of Protactaminum (Pa). Write down the equations to represent these two nuclear changes.
A nucleus `"_11Na^24` emits a beta particle to change into Magnesium (Mg).
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name `"_12^24Mg` with respect to `"_11^24Na`?
What will an alpha particle change into when it absorb two electrons.
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.
In nuclear power plants, neutrons are bombarded on atoms of __________.
Which substance is used as fuel in nuclear power plants?
