Given below are two statements: 
 

Assertion (A):	Isotopes of an element can be separated by using a mass spectrometer.
Reason (R):	Separation of isotopes is possible because of the difference in electron numbers of isotopes.

  

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

The energy required in \(\mathrm{MeV} / \mathrm{c}^2\) to separate \({ }_8^{16} \mathrm{O}\) into its constituents is:
(Given mass defect for \({ }_8^{16} \mathrm{O}=0.13691 \mathrm{u}\))
1. \(127.5\)
2. \(120.0\)
3. \(222.0\)
4. \(119.0\)

A nuclear reaction is given by

${}_{\mathrm{Z}}{\mathrm{X}}^{\mathrm{A}}{\to }_{\mathrm{Z}+1}{\mathrm{Y}}^{\mathrm{A}}{+}_{-1}{\mathrm{e}}^0+\overline{\mathrm{v}}$

represents:

1. β-decay

2. γ-decay

3. fusion

4. fission

The mass number of a nucleus is:

The mass of a proton is 1.0073 u and that of a neutron is 1.0087 u (u = atomic mass unit). The binding energy of ${}_2{}^4\mathrm{He}$ is: (Given: helium nucleus mass ≈ 4.0015 u)

Which of the following rays are not electromagnetic waves?

1. X-rays

2. γ-rays

3. β-rays

4. Heat rays