${}_{n}X_m$ emitted one $\alpha and\mathrm{2 }\beta$ particles, then it will become: 

1. ${}_{n}X_{m-4}$

2. ${}_{n-1}X_{m-1}$

3. ${}_{n}Z_{m-4}$

4. None of these

When X → $$\(N_{7}^{14}\)  + 2\(\beta^{-} \) then the number of neutrons in X will be:
1. 3
2. 5
3. 7
4. 9

If a radioactive element emitted one α and one β-particle, then the mass number of the daughter element is:

1.  decreased by 4

2.  increased by 4

3.  decreased by 2

4.  increased by 2

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

Which rays contain (+ve) charged particle:
1.  α-rays
2.  β-rays
3.  γ-rays
4.  X-rays

$\mathrm{If\; X}(n,$ $\alpha$ $)\; converts\; into$ $$ ${}_3{}^{7}Li$, then X will be: 

1. ${}_5{}^{10}B$

2.  ${}_5{}^{9}B$

3. ${}_4{}^{11}Be$

4. ${}_2{}^{4}He$

If a ${}_a{}^{b}X$ species emits firstly a positron, then two $\alpha$ and two β and at last one $\alpha$ is also emitted and finally convert into stable ${}_d{}^{c}Y$ species, so the correct relation will be: 
1.  c = b – 12,  d = a – 5
2.  a = c – 8,   d = b – 1
3.  a = c – 6,   d = b – 0
4.  a = c – 4,   a = b – 2

If a deuteron is bombarded on a ₈O¹⁶ nucleus then an α-particle is emitted. The product nucleus is:

1. ₇N¹³

2. ₅B¹⁰

3. ₄Be⁹

4. ₇N¹⁴

Which of the following rays are not electromagnetic waves?

1. X-rays

2. γ-rays

3. β-rays

4. Heat rays

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