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What is the deuterium nucleus made up of?- a)One proton and two neutron
- b)One proton and one neutron
- c)Two proton and one neutron
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
What is the deuterium nucleus made up of?
a)
One proton and two neutron
b)
One proton and one neutron
c)
Two proton and one neutron
d)
None of the above
|
Arien Instructors answered |
- Deuteron, nucleus of deuterium (heavy hydrogen) that consists of one proton and one neutron.
- Deuterons are formed chiefly by ionizing deuterium (stripping the single electron away from the atom) and are used as projectiles to produce nuclear reactions after accumulating high energies in particle accelerators.
If a U-238 nucleus splits into two identical parts, the two nuclei so produced will be- a)radioactive
- b)stable
- c)Isotope
- d)Isobar
Correct answer is option 'B'. Can you explain this answer?
If a U-238 nucleus splits into two identical parts, the two nuclei so produced will be
a)
radioactive
b)
stable
c)
Isotope
d)
Isobar
|
Zayed Al Rashid answered |
Explanation:
Stable nuclei:
When a U-238 nucleus splits into two identical parts, the two nuclei produced will be stable. This is because the two nuclei formed will have a similar number of protons and neutrons, leading to a balanced nuclear composition.
Identical parts:
Since the two nuclei are identical, they will have the same number of protons and neutrons. This symmetry in the nuclear structure contributes to the stability of the newly formed nuclei.
Stability:
Stable nuclei have a balanced ratio of protons and neutrons, which helps them maintain their structure without undergoing radioactive decay. In this case, the identical nature of the split U-238 nuclei ensures that they are stable.
Therefore, when a U-238 nucleus splits into two identical parts, the two nuclei produced will be stable due to their balanced nuclear composition and identical structure.
Stable nuclei:
When a U-238 nucleus splits into two identical parts, the two nuclei produced will be stable. This is because the two nuclei formed will have a similar number of protons and neutrons, leading to a balanced nuclear composition.
Identical parts:
Since the two nuclei are identical, they will have the same number of protons and neutrons. This symmetry in the nuclear structure contributes to the stability of the newly formed nuclei.
Stability:
Stable nuclei have a balanced ratio of protons and neutrons, which helps them maintain their structure without undergoing radioactive decay. In this case, the identical nature of the split U-238 nuclei ensures that they are stable.
Therefore, when a U-238 nucleus splits into two identical parts, the two nuclei produced will be stable due to their balanced nuclear composition and identical structure.
The graphite rods in the nuclear reactor-- a)React with Uranium to release energy
- b)Convert fast moving neutrons into thermal neutrons
- c)Undergo combustion which triggers the nuclear fission
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
The graphite rods in the nuclear reactor-
a)
React with Uranium to release energy
b)
Convert fast moving neutrons into thermal neutrons
c)
Undergo combustion which triggers the nuclear fission
d)
None of the above
|
|
Arien Instructors answered |
- Graphite rods are used as a moderator.
- Moderator is a material used in a nuclear reactor to slow down the neutrons produced from fission.
- By slowing the neutrons down the probability of neutron interacting with Uranium-235 nuclei is greatly increased thereby maintaining the chain reaction.
- By inserting control rods between the fuel rods the chain reaction can be slowed down or shut down.
- Hence option 2 is the answer.
Radio carbon dating technique is used to estimate the age of- a)Rocks
- b)Soil
- c)Fossils
- d)Buildings
Correct answer is option 'C'. Can you explain this answer?
Radio carbon dating technique is used to estimate the age of
a)
Rocks
b)
Soil
c)
Fossils
d)
Buildings
|
|
Arien Instructors answered |
- Carbon-14 dating is a method of age determination that depends upon the decay to nitrogen of radiocarbon (carbon-14 isotope).
- Carbon-14 is continually formed in nature by the interaction of neutrons with nitrogen-14 in the Earth’s atmosphere; the neutrons required for this reaction are produced by cosmic rays interacting with the atmosphere.
- Radiocarbon present in molecules of atmospheric carbon dioxide enters the biological carbon cycle: It is absorbed from the air by green plants and then passed on to animals through the food chain.
- Radiocarbon decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food and once the organism dies, however, it ceases to absorb carbon-14, so that the amount of the radiocarbon in its tissues steadily decreases.
- Carbon-14 has a half-life of 5,730 ± 40 years i.e., half the amount of the radioisotope present at any given time will undergo spontaneous disintegration during the succeeding 5,730 years.
- Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon.
The isotope of Uranium used in atomic reactors is- a)U235
- b)U236
- c)U237
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
The isotope of Uranium used in atomic reactors is
a)
U235
b)
U236
c)
U237
d)
None of the above
|
|
Arien Instructors answered |
- Energy from the uranium atom:
- The nucleus of the U-235 atom comprises 92 protons and 143 neutrons (92 + 143 = 235).
- When the nucleus of a U-235 atom captures a moving neutron it splits in two (fissions) and releases some energy in the form of heat, also two or three additional neutrons are thrown off.
- If enough of these expelled neutrons cause the nuclei of other U-235 atoms to split, releasing further neutrons, a fission 'chain reaction' can be achieved.
- When this happens over and over again, many millions of times, a very large amount of heat is produced from a relatively small amount of uranium.
Which one of the following is not a bio-mass energy source?- a)Wood
- b)Nuclear reactor
- c)Gobar gas
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
Which one of the following is not a bio-mass energy source?
a)
Wood
b)
Nuclear reactor
c)
Gobar gas
d)
None of the above
|
|
Arien Instructors answered |
- From the above, it is clear that wood, gobar- gas, and coal are an example of a biomass energy source. Therefore option 1, 2, and 4 is not a bio-mass energy source.
- On the other hand, nuclear energy is obtained from nuclear fusion and fission. Therefore option 2 is the answer.
Nuclei having the same number of neutrons but a different mass number are called- a)Isotopes
- b)Isobars
- c)Isotones
- d)Isotherms
Correct answer is option 'C'. Can you explain this answer?
Nuclei having the same number of neutrons but a different mass number are called
a)
Isotopes
b)
Isobars
c)
Isotones
d)
Isotherms
|
|
Arien Instructors answered |
- From the above, it is clear that nuclei having the same number of neutrons but a different mass number are called isotones. Therefore option 3 is correct.
An alpha particle is same as?- a)a helium nucleus
- b)a hydrogen nucleus
- c)a proton
- d)a positron
Correct answer is option 'A'. Can you explain this answer?
An alpha particle is same as?
a)
a helium nucleus
b)
a hydrogen nucleus
c)
a proton
d)
a positron
|
|
Arien Instructors answered |
- From above it is clear that the that an alpha particle consist of two proton and two neutrons and they are tightly bound.
- An alpha-particle is identical to the nucleus of a helium atom. Therefore option 1 is correct.
Charge on α-particle is how many times the charge on proton: - a)4 times
- b)2 times
- c)3 times
- d)Equal
Correct answer is option 'B'. Can you explain this answer?
Charge on α-particle is how many times the charge on proton:
a)
4 times
b)
2 times
c)
3 times
d)
Equal
|
|
Arien Instructors answered |
- Charge of proton = +e
- From above it is clear that the charge on an alpha particle is +2e.
- That represents the α particles are 2 times the charge of proton
Name the largest nuclear power station of India by capacity?- a)Tarapur
- b)Kakrapar
- c)Kaiga
- d)Kudankulam
Correct answer is option 'D'. Can you explain this answer?
Name the largest nuclear power station of India by capacity?
a)
Tarapur
b)
Kakrapar
c)
Kaiga
d)
Kudankulam
|
|
Arien Instructors answered |
- Kudankulam Nuclear Power Plant is located 650 km south of Chennai, in the Tirunelveli district of Tamilnadu, India.
- The power plant will have a combined capacity of 6000 Mega Watt upon completion.
- The Atomic Energy Commission was established in 1948 by the efforts of Dr. Homi Jahangir Bhabha, the father of Atomic Energy Research in India.
- India's first atomic research reactor 'Apsara' started working in Trombay (near Mumbai) but India's first Nuclear Power reactor was established at Tarapur in 1969.
- Production of nuclear energy requires uranium, thorium, and heavy water, Uranium is found in Jharkhand, Rajasthan, and Meghalaya.
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