Assertion: It is not possible to use 35Cl as the fuel for fusion energy.
Reason: The binding energy of 35Cl is too small.
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: The number of electrons in a p-type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature.
Reason: It is due to law of mass action.
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
A nucleus of mass number A, originally at rest, emits on -particle with speed v. The daughter nucleus recoil with speed a speed
When an electron-positron pair annihilates, the energy released is about
0.8 × 10-13 J
1.6 × 10-13 J
3.2 × 10-13 J
4.8 × 10-13 J
Two parallel beams of positrons moving in the same direction will
repel each other
will not interact with each other
attract each other
be deflected normal to the plane containing the two beams
Carbon dating is best suited for determining the age of fossils if their age in years is of the order of
108
104
104
106
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 the 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 but reason is not the correct explanation of assertion
If asserion and reason is false
If both assertion and reason are false
Assertion: Energy is released in nuclear fission.
Reason: Total binding energy of the fission fragments is larger than the total binding energy of the parent nucleus.
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 is false
A.
If both assertion and reason are true and reason is the correct explanation of assertion
When a heavy nucleus splits into two medium-sized ones, each of the new nuclei will have more binding energy per nucleon than the original nucleus. The extra energy will be given off.
e.g. if the uranium nucleus is broken into two small nuclei, the binding energy difference per nucleon is about 0.8 MeV. The total energy given off is therefore
× 235 nucleon = 188 MeV
Assertion: Heavy water preferred ever ordinary water as a moderator in reactors.
Reason: Heavy water, used for slowing down the neutrons, has lesser absorption probability
of neutrons than ordinary 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