The energy equivalent of \(0.5~\text g\) of a substance is:

1.	\(4.5\times10^{13}~\text J\)	2.	\(1.5\times10^{13}~\text J\)
3.	\(0.5\times10^{13}~\text J\)	4.	\(4.5\times10^{16}~\text J\)

What happens to the mass number and the atomic number of an element when it emits \(\gamma\text{-}\)radiation?

The binding energy per nucleon in deuterium and helium nuclei are \(1.1\) MeV and \(7.0\) MeV, respectively. When two deuterium nuclei fuse to form a helium nucleus the energy released in the fusion is:
1. \(2.2\) MeV
2. \(28.0\) MeV
3. \(30.2\) MeV
4. \(23.6\) MeV

Boron has two isotopes ${}_{5}B^{10}$ and ${}_{5}B^{11}$. If atomic weight of Boron is 10.81 then ratio of ${}_{5}B^{10}$ to ${}_{5}B^{11}$in nature will be: 

1. 15 : 16 

2. 19: 81

3. 81 : 19 

4. 20: 53

For the given reaction, the particle \(\mathrm{X}\) is:
\({ }_6^{11} \mathrm{C}\rightarrow { }_5^{11}\mathrm{B}+\beta^{+}+\mathrm{X}\)
1. neutron
2. anti-neutrino
3. neutrino
4. proton

In any fission process the ratio

$\frac{\text{\hspace{0.17em}mass of fission products\hspace{0.17em}}}{\text{\hspace{0.17em}mass of parent nucleus\hspace{0.17em}}}\text{\hspace{0.17em}is:}$

1. Greater than 1

2. Depends on the mass of the parent nucleus

3. Equal to 1

4. Less than 1

Fission of nuclei is possible because the binding energy per nucleon in them: