Assertion :In alpha decay of different radioactive nuclides, the energy of alpha particles has been compared. It is found that as the energy of alpha particle increases the half-life of the decay goes on decreasing. Reason: More is the energy in any decay process, more is the probability of decaying the nuclide which leads to faster rate of decay.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Assertion is incorrect but Reason is correct
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Assertion is correct but Reason is incorrect
C
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
D
Assertion is incorrect but Reason is correct
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Solution
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Energy of the radioactive sample is the determinant of the decay rate of a radioactive sample. Higher energy means a higher decay rate of the substance and thus shorter half lives.
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Similar Questions
Q1
Assertion :In alpha decay of different radioactive nuclides, the energy of alpha particles has been compared. It is found that as the energy of alpha particle increases the half-life of the decay goes on decreasing. Reason: More is the energy in any decay process, more is the probability of decaying the nuclide which leads to faster rate of decay.
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Q2
Assertion (A) All collision of reactant molecules lead to product formation.
Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.
(a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.
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Q3
Assertion: Average kinetic energy in one oscillation during SHM of a body is 14mω2A2. Reason: Maximum kinetic energy is 12mω2A2.
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Q4
Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.
Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.
(a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.
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Q5
Assertion: A proton and an α - particle are projected with the same kinetic energy at right angle to a uniform magnetic field, then the α - particle will move along a circular path of smaller radius than the proton.
Reason : Bqv=mv2r holds good for the charged particle moving in a circular path in a uniform magnetic field.