CBSE
Multiple Choice QuestionsCalculate power output of reactor, if it is takes 30 days to use up 2 kg of fuel, and if each fission gives 185 MeV of useable energy. Avogadro's number = 6 × 1023 / mol?
56.3 MW
60.3 MW
58.3 MW
54.3 MW
Assertion: 94Sr from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Reason: The energetics β-particles emitted in the decay of 94Sr damage the bone marrow.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: 90Sr from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of production of red blood cells.
Reason: The energies β-particles emitted in the decay of 90Sr damage the bone marrow.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: Heavy water is a better moderator than normal water.
Reason: Heavy water absorbs neutrons more efficiently than normal water.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
The foil bone has a 14C : 12C ratio, which is [ 1/16 ] of that in a living animal bone. If the half-life time of 14C is 5730 years, then the age of the fossil bone is
11460 years
17190 years
22920 years
45840 years
The operation of a nuclear reactor is said to be critical, if the multiplication factor ( K ) has a value
1
1.5
2.1
2.5
What is the energy of photon whose wavelength is 6840 ?
1.81 eV
3.6 eV
13.6 eV
12.1 eV
Which one of the following is a possible nuclear reaction?
has 92 protons and 238 nucleons. It decays by emitting an alpha particle and becomes
What is the amount of energy released by deuterium and tritium fusion? [ Given: =2.0141024 u, = 3.0160504 , = 1.0086654 u ]
60.6 eV
12.6 eV
17.6 eV
28.3 eV
