Q. No.The power obtained in a reactor using disintegration is 1000 kW. The mass decay of per hour is approximately equal to:
1.
2.
3.
4.
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The half-life of a radioactive element X is 50 yrs. It decays to another element Y which is stable. The two elements X and Y were found to be in the ratio of 1:15 in a sample of a given rock. The age of the rock was estimated to be:
1. 200 yr
2. 250 yr
3. 100 yr
4. 150 yr
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1. atoms get ionized at high temperature
2. kinetic energy is high enough to overcome the Coulomb repulsion between nuclei
3. molecules break up at high temperature
4. nuclei break up at high temperature
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The mass of a \({}_{3}^{7}\mathrm{Li}\) nucleus is \(0.042\) u less than the sum of the masses of all its nucleons. The binding energy per nucleon of the \({}_{3}^{7}\mathrm{Li}\) nucleus is near:
1. \(4.6\) MeV
2. \(5.6\) MeV
3. \(3.9\) MeV
4. \(23\) MeV
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The activity of a radioactive sample is measured as N0 counts per minute at t = 0 and N0/e counts per minute at t = 5 min. The time (in minute) at which the activity reduces to half its value is:
1.
2.
3.
4.
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In the nuclear decay given below:
the particles emitted in the sequence are:
| 1. | \(\beta, \alpha, \gamma \) | 2. | \(\gamma, \beta, \alpha \) |
| 3. | \(\beta, \gamma, \alpha \) | 4. | \(\alpha, \beta, \gamma\) |
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2. Isomer of parent
3. Isotone of parent
4. Isotope of parent
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| 1. | \(M(A, Z)=ZM_p+(A-Z) M_n-B E / c^2\) |
| 2. | \({M}({A}, {Z})={ZM}_{p}+({A}-{Z}) {M}_{n}+{BE}\) |
| 3. | \(M(A, Z)=ZM_p+(A-Z) M_n-B E\) |
| 4. | \({M}({A}, {Z})={ZM}_{p}+({A}-{Z}) {M}_{n}+{BE/c}^2 \) |
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In radioactive decay process, the negatively charged emitted β-particles are:
1. the electrons present inside the nucleus
2. the electrons produced as a result of the decay of neutrons inside the nucleus
3. the electrons produced as a result of collisions between atoms
4. the electrons orbiting around the nucleus
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