Problem 1
What is A in the following reaction? \({ }_{12} \mathrm{Mg}^{26}+{ }_{1} \mathrm{H}^{2} \longrightarrow{ }_{12} \mathrm{Mg}^{27}+\mathrm{A}\) (a) \({ }_{1} \mathrm{H}^{1}\) (b) \({ }_{0} \mathrm{n}^{1}\) (c) \(\mathrm{D}^{2}\) (d) \(\gamma\) rays
Problem 2
Which of the following is easily stopped by air? (a) uv rays (b) X-rays (c) \(\alpha\) rays (d) \(\gamma\) rays
Problem 3
\({ }_{90}^{232} \mathrm{Th} \longrightarrow{ }_{82}^{208} \mathrm{~Pb}\) The number of \(\alpha\) and \(\beta\) particle emitted during the above reaction is (a) \(8 \alpha\) and \(4 \beta\) (b) \(8 \alpha\) and \(16 \beta\) (c) \(4 \alpha\) and \(2 \beta\) (d) \(6 \alpha\) and \(4 \beta\)
Problem 4
Which one of the following statement is correct? (a) the end nuclide formed in thorium (4n) series is \({ }_{83} \mathrm{Bi}^{-200}\). (b) \(_{7} \mathrm{~N}^{15}\) and \({ }_{\mathrm{s}} \mathrm{O}^{16}\) are isobars (c) \({ }_{20} \mathrm{Ca}^{40}\) has magic number of protons and magic number of neutrons (d) The radius (R) of a nuclide of mass number \(\mathrm{A}\) is given by the equation \(\mathrm{R}=\mathrm{R}_{0}(\mathrm{~A})^{1 / 2}\left(\mathrm{R}_{0}=\right.\) constant \()\)
Problem 5
Which one of the following radioisotopes is used in the treatment of blood cancer? (a) \(\mathrm{Co}^{62}\) (b) \(\mathrm{P}^{32}\) (c) \(\mathrm{Na}^{24}\) (d) \(I^{131}\)
Problem 7
Unstable substances exhibit higher radioactivity due to (a) high \(\mathrm{p} / \mathrm{n}\) ratio (b) low \(\mathrm{p} / \mathrm{n}\) ratio (c) \(\mathrm{p} / \mathrm{n}=1\) (d) both (a) and (b)
Problem 8
Atom bomb is based on the principle of (a) nuclear fusion (b) nuclear fission (c) nuclear transformation (d) carbon dating
Problem 10
The moderator used in nuclear reactors is (a) TEL (b) \(\mathrm{D}_{2} \mathrm{O}\) (c) \(\mathrm{H}_{2} \mathrm{O}_{2}\) (d) \(\mathrm{R}-\mathrm{O}-\mathrm{R}\)
Problem 11
The element used for carrying out the nuclear reaction is (a) Thorium- 232 (b) Uranium-238 (c) Plutonium-239 (d) Neptunium- 293
Problem 13
If the mass defect of a nuclide is \(3.32 \times 10^{-26} \mathrm{~g}\), its binding energy is ..... MeV (a) \(27.93\) (b) \(9.31\) (c) \(37.24\) (d) \(18.62\)
