If the density of gold nucleus is X, then the density of silver nucleus will be: 1.  2X 2. $\frac{X}{3}$ 3.  4X 4.  X

Subtopic:  Nucleus |
81%
From NCERT
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The volume (V) of a nucleus is related to its mass (M) as:

1.  $V$ $\propto$ $M$

2.  $V$ $\propto$ $\frac{1}{M}$

3.  $V$ $\propto$ ${M}^{3}$

4.  $V$ $\propto$ $\frac{1}{{M}^{3}}$

Subtopic:  Nucleus |
77%
From NCERT
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After two alpha decays and four beta(-ve) decays, the atomic number:

 1 Decreases by 4 and mass number remains same. 2 Remains the same but the mass number increases by 4. 3 Remains the same but mass number decreases by 8. 4 Increases but mass number remains same.

Subtopic:  Types of Decay |
84%
From NCERT
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The binding energies of the nuclei A and B are Ea and Eb respectively. If three atoms of the element B fuse to give one atom of element A and an energy Q is released, then Ea, Eb and Q are related as:

1. Ea – 3Eb = Q

2. 3Eb – Ea = Q

3. Ea + 3Eb = Q

4. Eb + 3Ea = Q

Subtopic:  Nuclear Binding Energy |
67%
From NCERT
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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

Subtopic:  Nuclear Binding Energy |
70%
From NCERT
AIPMT - 2010
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In the nuclear decay given below:
${}_{\mathrm{Z}}{}^{\mathrm{A}}\mathrm{X}\to {}_{\mathrm{Z}+1}{}^{\mathrm{A}}\mathrm{Y}\to {}_{\mathrm{Z}-1}{}^{\mathrm{A}-4}\mathrm{B}\to {}_{\mathrm{Z}-1}{}^{\mathrm{A}-4}\mathrm{B}$
the particles emitted in the sequence are:

 1 $$\beta, \alpha, \gamma$$ 2 $$\gamma, \beta, \alpha$$ 3 $$\beta, \gamma, \alpha$$ 4 $$\alpha, \beta, \gamma$$
Subtopic:  Types of Decay |
87%
From NCERT
AIPMT - 2009
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If M (A, Z), ${\mathrm{M}}_{p}$, and ${\mathrm{M}}_{n}$ denote the masses of the nucleus ${}_{\mathrm{Z}}{}^{\mathrm{A}}\mathrm{X}$, proton, and neutron respectively in units of u (1 u = 931.5 MeV/c2) and BE represents its binding energy in MeV, then:

 1 $$M(A, Z)=Z_p+(A-Z) M_n-B E / c^2$$ 2 $$\mathrm{M}(\mathrm{A}, \mathrm{Z})=\mathrm{ZM}_{\mathrm{p}}+(\mathrm{A}-\mathrm{Z}) \mathrm{M}_{\mathrm{n}}+\mathrm{BE}$$ 3 $$M(A, Z)=Z_p+(A-Z) M_n-B E$$ 4 $$\mathrm{M}(\mathrm{A}, \mathrm{Z})=\mathrm{ZM}_{\mathrm{p}}+(\mathrm{A}-\mathrm{Z}) \mathrm{M}_{\mathrm{n}}+\mathrm{BE} / \mathrm{c}^2$$

Subtopic:  Nuclear Binding Energy |
65%
From NCERT
AIPMT - 2008
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The binding energy of deuteron is 2.2 MeV and that of ${}_{2}H{e}^{4}$ is 28 MeV. If two deuterons are fused to form one ${}_{2}H{e}^{4}$ then the energy released is:

 1 25.8 MeV 2 23.6 MeV 3 19.2 MeV 4 30.2 MeV
Subtopic:  Nuclear Binding Energy |
82%
From NCERT
AIPMT - 2006
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Which of the following pairs of nuclei are isotones?

1. ${}_{34}{}^{74}\mathrm{Se},$ ${}_{31}{}^{71}\mathrm{Ca}$

2. ${}_{42}{}^{92}\mathrm{Mo},$ ${}_{40}{}^{92}\mathrm{Zr}$

3. ${}_{38}{}^{81}\mathrm{Sr},$ ${}_{38}{}^{86}\mathrm{Sr}$

4. ${}_{20}{}^{40}\mathrm{Ca},$ ${}_{16}{}^{32}\mathrm{S}$

Subtopic:  Nuclear Binding Energy |
85%
From NCERT
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Fusion reaction takes place at a higher temperature because:

 1 atoms get ionized at high temperatures. 2 kinetic energy is high enough to overcome the Coulomb repulsion between nuclei. 3 molecules break up at a high temperature. 4 nuclei break up at a high temperature.
Subtopic:  Nuclear Energy |
81%
From NCERT
NEET - 2011
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