MCQ
A nucleus $_n{X^m}$emits one $\alpha $ and one $\beta $ particles. The resulting nucleus is
  • A
    $_n{X^{m - 4}}$
  • B
    $_{n - 2}{Y^{m - 4}}$
  • C
    $_{n - 4}{Z^{m - 4}}$
  • $_{n - 1}{Z^{m - 4}}$

Answer

Correct option: D.
$_{n - 1}{Z^{m - 4}}$
d
(d)$_{n}{{X}^{m}}{{\xrightarrow{\alpha }}_{n-2}}{{X}^{m-4}}{{\xrightarrow{-\beta }}_{n-1}}{{X}^{m-4}}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

In general in an alternating current circuit
Energy of electrons can be increased by allowing them
A uniform current carrying ring of mass $m$ and radius $R$ is connected by a massless string as shown. A uniform magnetic field $B_0$ exist in the region to keep the ring in horizontal position, then the current in the ring is  ($l =$ length of string)
The core of a transformer is laminated to reduce energy losses due to
Two small spherical balls each carrying a charge $Q = 10\,\mu C$ ($10\, micro-coulomb$) are suspended by two insulating threads of equal lengths $3\, m$ each, from a point fixed in the ceiling. It is found that in equilibrium threads are separated by an angle $120^o$ between them, as shown in the figure. What is the tension in the threads (Given : $\frac{1}{{\left( {4\pi {\varepsilon _0}} \right)}} = 9 \times {10^9}\,Nm/{C^2}$)
Light of wavelength $\lambda$ falls on a metal having work function $\frac{\text{h}_\text{c}}{\lambda_0}.$ Photoelectric effect will take place only if:
The essential distinction between $X-$ rays and $\gamma - $ rays is that
Two wires $A$ and $B$ , having identical geometrical construction, are stretched from their natural length by small but equal amount. The Young's modulus of the wires are $Y_{\mathrm{A}}$ and $Y_{\mathrm{B}}$ whereas the densities are $\rho_{\mathrm{A}}>\rho_{\mathrm{B}^{+}}$It is given that $\mathrm{Y}_{\mathrm{A}}>\mathrm{Y}_{\mathrm{B}}$ and $\rho_{\mathrm{A}}>\rho_{\mathrm{B}^{+}} . \mathrm{A}$ transverse signal started at one end takes a time $\mathrm{t}_1$ to reach the other end for $A$ and $\mathrm{t}_2$ for $B.$
Two long parallel copper wires carry currents of $5\,A$ each in opposite directions. If the wires are separated by a distance of $0.5\,m$, then the force between the two wires is
A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness $d_1$ and dielectric constant $k_1$ and the other has thickness $d_2$ and dielectric constant $k_2$ as shown in Fig.

This arrangement can be thought as a dielectric slab of thickness $d (= d_1 + d_2)$ and effective dielectric constant $k$. The k is