NEET Test Series from KOTA - 10 Papers In MS WORD
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NUCLEAR PHYSICS
147487
Enriched uranium is used in nuclear rectors because, it contains greater proportion of
1 $\mathrm{U}^{238}$
2 $\mathrm{U}^{235}$
3 $\mathrm{U}^{239}$
4 $\mathrm{U}^{233}$
Explanation:
B Enriched uranium is used in nuclear reactor because it has larger proportion of ${ }_{92} \mathrm{U}^{235}$ may be $90 \%$ and natural uranium contains only $0.7 \%$ of ${ }_{92} \mathrm{U}^{235}$
J and K CET- 2009
NUCLEAR PHYSICS
147488
For a nuclear reactor to be in critical condition, the value of neutron multiplication factor (K) must be
1 $\mathrm{K}>1$
2 $\mathrm{K} \lt 1$
3 $\mathrm{K}=1$
4 $\mathrm{K}=0$
Explanation:
C Multiplication factor K of a nuclear reactor is the number of neutrons in a generation of reaction per neutron in the previous generation for a chain reaction to sustain in critical condition, each generation must have one neutron per neutron in previous generation. $\mathrm{K}=1$
J and K CET- 2008
NUCLEAR PHYSICS
147489
Mass of the nucleons together in a heavy nucleus is
1 greater than mass of nucleus
2 equal to mass of nucleus
3 same as mass of nucleus
4 any of these
Explanation:
A Mass of nucleons together in a heavy nucleus is greater than the mass of nucleus. The energy equivalent of the missing mass of a nucleus is called the binding energy of the nucleus.
J and K CET- 2006
NUCLEAR PHYSICS
147493
If the binding energies of a deuteron and an alpha-particle are 1.125 $\mathrm{MeV}$ and $7.2 \mathrm{MeV}$, respectively, then the more stable of the two is
1 deuteron
2 alpha-particle
3 both (a) and (b)
4 sometimes deuteron and sometimes alpha particle
Explanation:
B Given that, binding energy per nucleon of ${ }_{1} \mathrm{H}^{2}$ $=1.125 \mathrm{MeV}$ Binding energy per nucleon of helium $\left({ }_{2} \mathrm{He}^{4}\right)=7.2 \mathrm{MeV}$ Since, more binding energy per nucleon will be more stable nuclei. So, alpha-particle is more stable.
147487
Enriched uranium is used in nuclear rectors because, it contains greater proportion of
1 $\mathrm{U}^{238}$
2 $\mathrm{U}^{235}$
3 $\mathrm{U}^{239}$
4 $\mathrm{U}^{233}$
Explanation:
B Enriched uranium is used in nuclear reactor because it has larger proportion of ${ }_{92} \mathrm{U}^{235}$ may be $90 \%$ and natural uranium contains only $0.7 \%$ of ${ }_{92} \mathrm{U}^{235}$
J and K CET- 2009
NUCLEAR PHYSICS
147488
For a nuclear reactor to be in critical condition, the value of neutron multiplication factor (K) must be
1 $\mathrm{K}>1$
2 $\mathrm{K} \lt 1$
3 $\mathrm{K}=1$
4 $\mathrm{K}=0$
Explanation:
C Multiplication factor K of a nuclear reactor is the number of neutrons in a generation of reaction per neutron in the previous generation for a chain reaction to sustain in critical condition, each generation must have one neutron per neutron in previous generation. $\mathrm{K}=1$
J and K CET- 2008
NUCLEAR PHYSICS
147489
Mass of the nucleons together in a heavy nucleus is
1 greater than mass of nucleus
2 equal to mass of nucleus
3 same as mass of nucleus
4 any of these
Explanation:
A Mass of nucleons together in a heavy nucleus is greater than the mass of nucleus. The energy equivalent of the missing mass of a nucleus is called the binding energy of the nucleus.
J and K CET- 2006
NUCLEAR PHYSICS
147493
If the binding energies of a deuteron and an alpha-particle are 1.125 $\mathrm{MeV}$ and $7.2 \mathrm{MeV}$, respectively, then the more stable of the two is
1 deuteron
2 alpha-particle
3 both (a) and (b)
4 sometimes deuteron and sometimes alpha particle
Explanation:
B Given that, binding energy per nucleon of ${ }_{1} \mathrm{H}^{2}$ $=1.125 \mathrm{MeV}$ Binding energy per nucleon of helium $\left({ }_{2} \mathrm{He}^{4}\right)=7.2 \mathrm{MeV}$ Since, more binding energy per nucleon will be more stable nuclei. So, alpha-particle is more stable.
147487
Enriched uranium is used in nuclear rectors because, it contains greater proportion of
1 $\mathrm{U}^{238}$
2 $\mathrm{U}^{235}$
3 $\mathrm{U}^{239}$
4 $\mathrm{U}^{233}$
Explanation:
B Enriched uranium is used in nuclear reactor because it has larger proportion of ${ }_{92} \mathrm{U}^{235}$ may be $90 \%$ and natural uranium contains only $0.7 \%$ of ${ }_{92} \mathrm{U}^{235}$
J and K CET- 2009
NUCLEAR PHYSICS
147488
For a nuclear reactor to be in critical condition, the value of neutron multiplication factor (K) must be
1 $\mathrm{K}>1$
2 $\mathrm{K} \lt 1$
3 $\mathrm{K}=1$
4 $\mathrm{K}=0$
Explanation:
C Multiplication factor K of a nuclear reactor is the number of neutrons in a generation of reaction per neutron in the previous generation for a chain reaction to sustain in critical condition, each generation must have one neutron per neutron in previous generation. $\mathrm{K}=1$
J and K CET- 2008
NUCLEAR PHYSICS
147489
Mass of the nucleons together in a heavy nucleus is
1 greater than mass of nucleus
2 equal to mass of nucleus
3 same as mass of nucleus
4 any of these
Explanation:
A Mass of nucleons together in a heavy nucleus is greater than the mass of nucleus. The energy equivalent of the missing mass of a nucleus is called the binding energy of the nucleus.
J and K CET- 2006
NUCLEAR PHYSICS
147493
If the binding energies of a deuteron and an alpha-particle are 1.125 $\mathrm{MeV}$ and $7.2 \mathrm{MeV}$, respectively, then the more stable of the two is
1 deuteron
2 alpha-particle
3 both (a) and (b)
4 sometimes deuteron and sometimes alpha particle
Explanation:
B Given that, binding energy per nucleon of ${ }_{1} \mathrm{H}^{2}$ $=1.125 \mathrm{MeV}$ Binding energy per nucleon of helium $\left({ }_{2} \mathrm{He}^{4}\right)=7.2 \mathrm{MeV}$ Since, more binding energy per nucleon will be more stable nuclei. So, alpha-particle is more stable.
147487
Enriched uranium is used in nuclear rectors because, it contains greater proportion of
1 $\mathrm{U}^{238}$
2 $\mathrm{U}^{235}$
3 $\mathrm{U}^{239}$
4 $\mathrm{U}^{233}$
Explanation:
B Enriched uranium is used in nuclear reactor because it has larger proportion of ${ }_{92} \mathrm{U}^{235}$ may be $90 \%$ and natural uranium contains only $0.7 \%$ of ${ }_{92} \mathrm{U}^{235}$
J and K CET- 2009
NUCLEAR PHYSICS
147488
For a nuclear reactor to be in critical condition, the value of neutron multiplication factor (K) must be
1 $\mathrm{K}>1$
2 $\mathrm{K} \lt 1$
3 $\mathrm{K}=1$
4 $\mathrm{K}=0$
Explanation:
C Multiplication factor K of a nuclear reactor is the number of neutrons in a generation of reaction per neutron in the previous generation for a chain reaction to sustain in critical condition, each generation must have one neutron per neutron in previous generation. $\mathrm{K}=1$
J and K CET- 2008
NUCLEAR PHYSICS
147489
Mass of the nucleons together in a heavy nucleus is
1 greater than mass of nucleus
2 equal to mass of nucleus
3 same as mass of nucleus
4 any of these
Explanation:
A Mass of nucleons together in a heavy nucleus is greater than the mass of nucleus. The energy equivalent of the missing mass of a nucleus is called the binding energy of the nucleus.
J and K CET- 2006
NUCLEAR PHYSICS
147493
If the binding energies of a deuteron and an alpha-particle are 1.125 $\mathrm{MeV}$ and $7.2 \mathrm{MeV}$, respectively, then the more stable of the two is
1 deuteron
2 alpha-particle
3 both (a) and (b)
4 sometimes deuteron and sometimes alpha particle
Explanation:
B Given that, binding energy per nucleon of ${ }_{1} \mathrm{H}^{2}$ $=1.125 \mathrm{MeV}$ Binding energy per nucleon of helium $\left({ }_{2} \mathrm{He}^{4}\right)=7.2 \mathrm{MeV}$ Since, more binding energy per nucleon will be more stable nuclei. So, alpha-particle is more stable.
