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प्रश्न
Write the problems associated with hydroelectric power projects.
Write two problems associated with hydroelectric power plant.
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उत्तर
- The back-water due to storage of water in a dam may submerge villages or towns in that area. This leads to the problems of rehabilitation of the displaced population. Moreover, this can also submerge forests as well as fertile land.
- The obstruction of the flow of river water may have an adverse effect on the living world in the river.
संबंधित प्रश्न
One of the following is not a characteristic of a good fuel. This is:
(a) high calorific value
(b) no emission of smoke
(c) smooth burning
(d) high ignition temperature
Which particles bring about the fission of uranium-235?
Which of the two, nuclear fusion and nuclear fusion, is made use of:
(1) for the production of electricity?
(2) for making a hydrogen bomb?
The control rods used in the reactor of a nuclear power plant are made of:
(a) steel
(b) graphite
(c) uranium
(d) boron
The 'coolants' which can be used in the reactor of a nuclear power station are:
(a) liquid mercury and nitrogen dioxide
(b) liquid sodium and carbon dioxide
(c) liquid ammonia and carbon monoxide
(d) liquid boron and uranium oxide
One atomic mass unit (u) is equivalent to an energy of:
A nuclear reaction is represented by the following equation:
`""_92^235U+_0^1n-> _56^139Ba+_36^94Kr+xc+E`
Name one installation where the above nuclear reaction is utilised.
Identify the process shown in the figure and name it.
Which of the following statements are correct?
Neutrons have
State the kind of nuclear reaction taking place in a nucleus during the emission of a β-particle.
How does the position of an element change in the periodic table when it emits out an alpha particle?
What will an alpha particle change into when it absorb one electron.
How many alpha and beta particles are emitted when the uranium nucleus 92U238 decays to Lead If 82Pb206?
An isotope of uranium is 92Y238, i.e., it has mass number 235 and atomic number 92.
Do all isotopes have the same number of neutrons?
Explain, why nuclear fusion is not being used to meet day to day energy needs.
Nuclear power plants in India
In nuclear power plants, the chain reaction cannot be controlled.
In nuclear power plants, turbines working on solar panels are used.
Complete the following nuclear changes:
\[\ce {^238_92 P ->\underset{-}-{Q} + ^4_2He->\underset{-}-{R} + ^0_-1e}\]
Give scientific reasons.
It is absolutely necessary to control the fission reaction in nuclear power plants.
