The variation of decay rate of two radioactive samples A and B with ti

1.	The variation of decay rate of two radioactive samples A and B with time is shown in Fig. 13.1. Which of the following statements are true? (a) Decay constant of A is greater than that of B, hence A always decays faster than B. (b) Decay constant of B is greater than that of A but its decay rate is always smaller than that of A. (c) Decay constant of A is greater than that of B but it does not always decay faster than B. (d) Decay constant of B is smaller than that of A but still its decay rate becomes equal to that of A at a later instant.
Answer» (c), (d) (c) Decay constant of A is greater than that of B but it does not always decay faster than B. (d) Decay constant of B is smaller than that of A but still its decay rate becomes equal to that of A at a later instant.

The variation of decay rate of two radioactive samples A and B with time is shown in Fig. 13.1. Which of the following statements are true? (a) Decay constant of A is greater than that of B, hence A always decays faster than B. (b) Decay constant of B is greater than that of A but its decay rate is always smaller than that of A. (c) Decay constant of A is greater than that of B but it does not always decay faster than B. (d) Decay constant of B is smaller than that of A but still its decay rate becomes equal to that of A at a later instant.

Answer»

(c), (d)

(d) Decay constant of B is smaller than that of A but still its decay rate becomes equal to that of A at a later instant.

Discussion

No Comment Found

Related InterviewSolutions

A bone containing `200 g` carbon-14 has `beta`-decay rate of `375` decay/min. Calculate the time that has elapsed since the death of the living one. Given the rate of decay for the living organism is equal to `15` decay per min per gram of carbon and half-life of carbon-14 is `5730 years`.A. 22920 yrB. 11460 yrC. 17190 yrD. None of these
Fusion processes, like combining two deuterons to form a He nucleus are impossible at ordinary temperatures and pressure. The reasons for this can be traced to the fact: (a) nuclear forces have short range. (b) nuclei are positively charged. (c) the original nuclei must be completely ionized before fusion can take place. (d) the original nuclei must first break up before combining with each other.
A deuteron strikes `""._(7) N^(14)` nucles with the subsequent emission of an `alpha `-particle ,Find the atomic number , Mass number and chemical name of the element so produced
A deutron strikes `._8 O^16` nucleus with subsequent emission of an alpha particle. Idenify the nucleus so produced.
Fast neutrons can easily be slowed down byA. Passing them through waterB. Applying a strong electric fieldC. The use of lead shieldingD. Elastic collisions with heavy nude
Assertion:Nuclear sources will give a million times larger energy than conventional sources. Reason:Nuclear energy sources are massive than conventional energy sources.A. If both assertion and reason are true and reason is the correct explanation of assertion .B. If both assertion and reason are true but reason is not the correct explanation of assertion .C. If assertion is true but reason is false .D. If both assertion and reason are false
Assertion:Fusion of hydrogen nuclei into helium nuclei is the source of energy of all stars. Reason:In fusion heavier nuclei split to form lighter nuclei.A. If both assertion and reason are true and reason is the correct explanation of assertion .B. If both assertion and reason are true but reason is not the correct explanation of assertion .C. If assertion is true but reason is false .D. If both assertion and reason are false
Assertion:Neutrons penetrate matter more readily as compared to protons. Reason:A neutron has no charge .A. If both assertion and reason are true and reason is the correct explanation of assertion .B. If both assertion and reason are true but reason is not the correct explanation of assertion .C. If assertion is true but reason is false .D. If both assertion and reason are false
Assertion:There occurs a chain reaction when uranium is bombarded with slow neutrons. Reason:When uranium is bombarded with slow neutrons more neutrons are producedA. If both assertion and reason are true and reason is the correct explanation of assertion .B. If both assertion and reason are true but reason is not the correct explanation of assertion .C. If assertion is true but reason is false .D. If both assertion and reason are false
The three stable isotopes of neon : `._(10)^(20)Ne, ._(10)^(21)Ne` and `._(10)^(22)Ne` have respective abundance of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of Neon.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment