Question:
Which of the following is radioactive?
Which of the following is radioactive?
Updated On: Apr 15, 2025
- Hydrogen
- Deuterium
- Tritium
- None of these
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
The correct answer is Tritium.
Here's why:
- Isotopes of Hydrogen: Hydrogen has three isotopes:
- Protium (Hydrogen): 1H (1 proton, 0 neutrons). It is the most common and stable isotope of hydrogen and is not radioactive.
- Deuterium: 2H or D (1 proton, 1 neutron). It is a stable, non-radioactive isotope of hydrogen. It is used in nuclear magnetic resonance (NMR) spectroscopy as a solvent. Heavy water (D2O) is water in which the hydrogen atoms are replaced by deuterium.
- Tritium: 3H or T (1 proton, 2 neutrons). Tritium is a radioactive isotope of hydrogen. Its nucleus is unstable and decays through beta decay.
- Radioactivity: Tritium undergoes beta decay, emitting an electron and an antineutrino, and transforming into helium-3: $^3_1H \rightarrow ^3_2He + e^- + \overline{\nu}_e$
Therefore, Tritium is the only radioactive isotope among the options.
Correct Answer: Tritium
Was this answer helpful?
0
0
Top Questions on Radioactivity
- A region in the form of an equilateral triangle (in x-y plane) of height \( L \) has a uniform magnetic field \( \mathbf{B} \) pointing in the \( +z \)-direction. A conducting loop PQR, in the form of an equilateral triangle of the same height \( L \), is placed in the x-y plane with its vertex \( P \) at \( x = 0 \) in the orientation shown in the figure. At \( t = 0 \), the loop starts entering the region of the magnetic field with a uniform velocity \( \mathbf{v} \) along the \( +x \)-direction. The plane of the loop and its orientation remain unchanged throughout its motion.
Which of the following graphs best depicts the variation of the induced emf (\( \mathcal{E} \)) in the loop as a function of the distance (\( x \)) starting from \( x = 0 \)?- JEE Advanced - 2024
- Physics
- Radioactivity
- A table tennis ball has radius \( \frac{3}{2} \times 10^{-2} \, \text{m} \) and mass \( \frac{22}{7} \times 10^{-3} \, \text{kg} \). It is slowly pushed down into a swimming pool to a depth \( d = 0.7 \, \text{m} \) below the water surface and then released from rest. It emerges from the water surface at speed \( v \), without getting wet, and rises to a height \( H \). Which of the following option(s) is(are) correct?\(\text{(Given: } \pi = \frac{22}{7}, g = 10 \, \text{m/s}^2, \text{density of water} = 1 \times 10^3 \, \text{kg/m}^3, \text{viscosity of water} = 1 \times 10^{-3} \, \text{Pa.s).}\)
- JEE Advanced - 2024
- Physics
- Radioactivity
- An infinitely long thin wire, having a uniform charge density per unit length of \(5 \, \text{nC/m}\), is passing through a spherical shell of radius \(1 \, \text{m}\), as shown in the figure. A \(10 \, \text{nC}\) charge is distributed uniformly over the spherical shell. If the configuration of the charges remains static, the magnitude of the potential difference between points \(P\) and \(R\), in Volt, is ______. \[ \text{(Given: In SI units } \frac{1}{4\pi\epsilon_0} = 9 \times 10^9, \ln 2 = 0.7). \] Ignore the area pierced by the wire.
- JEE Advanced - 2024
- Physics
- Radioactivity
- The half-life period of a radioactive element is 2 days. If \( \frac{1}{32} \) part of the initial amount remains undecayed after a time \( t \), then the value of \( t \) in days is
- KEAM - 2024
- Physics
- Radioactivity
- Half-life of radon is 3.5 days. The amount of radon left out of 12 mg mass undecayed after 35 days is nearly
- KEAM - 2024
- Physics
- Radioactivity
View More Questions
Questions Asked in WBJEE exam
- The position vector of a particle of mass \(m\) moving with a constant velocity \(\mathbf{u}\) is given by \(\mathbf{r} = x(t)\hat{i} + b\hat{j}\), where \(b\) is a constant. At an instant, \(\mathbf{r}\) makes an angle \(\theta\) with the x-axis as shown in the figure. The variation of the angular momentum of the particle about the origin with \(\theta\) will be:
- WBJEE - 2024
- rotational motion
- The acceleration \( f \) (in ft/sec\(^2\)) of a particle after a time \( t \) seconds starting from rest is given by:
\[ f = 6 - \sqrt{1.2t}. \]
Then the maximum velocity \( v \) and the time \( T \) to attain this velocity are:- WBJEE - 2024
- Differential Equations
- The acceleration-time graph of a particle moving in a straight line is shown in the f igure. If the initial velocity of the particle is zero, then the velocity-time graph of the particle will be:
- WBJEE - 2024
- Kinematics
- All values of \(a\) for which the inequality
\[ \frac{1}{\sqrt{a}} \int_{1}^{a} \left( \frac{3}{2} \sqrt{x} + 1 - \frac{1}{\sqrt{x}} \right) dx < 4 \]
is satisfied, lie in the interval.- WBJEE - 2024
- Integration
A beam of light of wavelength \(\lambda\) falls on a metal having work function \(\phi\) placed in a magnetic field \(B\). The most energetic electrons, perpendicular to the field, are bent in circular arcs of radius \(R\). If the experiment is performed for different values of \(\lambda\), then the \(B^2 \, \text{vs} \, \frac{1}{\lambda}\) graph will look like (keeping all other quantities constant).
- WBJEE - 2024
- Quantum Mechanics
View More Questions