Select Chapter Topics:

The power obtained in a reactor using \(\mathrm{U}^{235}\) ${\mathrm{}}^{}$disintegration is \(1000~\text{kW}\). The mass decay of \(\mathrm{U}^{235}\) ${\mathrm{}}^{}$per hour is approximately equal to:

1. \(20~\mu\text{g}\)

2. \(40~\mu\text{g}\)

3. \(1~\mu\text{g}\)

4. \(10~\mu\text{g}\)

Subtopic: Mass-Energy Equivalent |

66%

From NCERT

AIPMT - 2011

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Fusion reaction takes place at high temperature because:

1. | atoms get ionized at high temperature |

2. | kinetic energy is high enough to overcome the Coulomb repulsion between nuclei |

3. | molecules break up at high temperature |

4. | nuclei break up at high temperature |

Subtopic: Nuclear Energy |

81%

From NCERT

AIPMT - 2011

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A nucleus \({ }_{{n}}^{{m}} \mathrm{X}\) emits one $\mathrm{}$\(\alpha\text -\text{particle}\) and two \(\beta\text- \text{particle}\) The resulting nucleus is:

1. | \(^{m-}{}_n^6 \mathrm{Z} \) | 2. | \(^{m-}{}_{n}^{4} \mathrm{X} \) |

3. | \(^{m-4}_{n-2} \mathrm{Y}\) | 4. | \(^{m-6}_{n-4} \mathrm{Z} \) |

Subtopic: Types of Decay |

81%

From NCERT

AIPMT - 2011

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

The mass of a ${}_{3}{}^{7}\mathrm{Li}$ nucleus is \(0.042~\text{u}\) less than the sum of the masses of all its nucleons. The binding energy per nucleon of the ${}_{3}{}^{7}\mathrm{Li}$ nucleus is near:

1. \(4.6~\text{MeV}\)

2. \(5.6~\text{MeV}\)

3. \(3.9~\text{MeV}\)

4. \(23~\text{MeV}\)

Subtopic: Nuclear Binding Energy |

72%

From NCERT

AIPMT - 2010

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

In the nuclear decay given below:

\({ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{X} \rightarrow { }_{\mathrm{Z}+1}^{\mathrm{A}} \mathrm{Y}\rightarrow { }_{\mathrm{Z-1}}^{\mathrm{A-4}} \mathrm{B}\rightarrow { }_{\mathrm{Z-1}}^{\mathrm{A-4}} \mathrm{B}\) the particles emitted in the sequence are:

\({ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{X} \rightarrow { }_{\mathrm{Z}+1}^{\mathrm{A}} \mathrm{Y}\rightarrow { }_{\mathrm{Z-1}}^{\mathrm{A-4}} \mathrm{B}\rightarrow { }_{\mathrm{Z-1}}^{\mathrm{A-4}} \mathrm{B}\) the particles emitted in the sequence are:

1. | \(\beta, \alpha, \gamma\) | 2. | \( \gamma, \beta, \alpha\) |

3. | \(\beta, \gamma,\alpha\) | 4. | \(\alpha,\beta, \gamma\) |

Subtopic: Types of Decay |

89%

From NCERT

AIPMT - 2009

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an:

1. Isobar of a parent.

2. Isomer of a parent.

3. Isotone of a parent.

4. Isotope of a parent.

Subtopic: Types of Decay |

65%

From NCERT

AIPMT - 2009

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

The decay constants of two radioactive materials X_{1} and X_{2} are \(5\lambda\) and \(\lambda\) respectively. Initially, they have the same number of nuclei. The ratio of the number of nuclei of X_{1} to that of X_{2 } will be \(1/e\) after a time:

1. \(\lambda\)

2. \(\frac{1}{2\lambda }\)

3. \(\frac{1}{4\lambda }\)

4. \(\frac{e}{\lambda }\)

Subtopic: Types of Decay |

79%

From NCERT

AIPMT - 2008

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

If \(M(A,~Z)\), \(M_p\)${}_{}$, and \(M_n\) denote the masses of the nucleus \(^{A}_{Z}X,\) proton, and neutron respectively in units of \(u\) \((1~u=931.5~\text{MeV/c}^2)\) and represent its binding energy \((BE)\) in \(\text{MeV}\). Then:

1. | \(M(A, Z) = ZM_p + (A-Z)M_n- \dfrac{BE}{c^2}\) |

2. | \(M(A, Z) = ZM_p + (A-Z)M_n+ BE\) |

3. | \(M(A, Z) = ZM_p + (A-Z)M_n- BE\) |

4. | \(M(A, Z) = ZM_p + (A-Z)M_n+ \dfrac{BE}{c^2}\) |

Subtopic: Mass-Energy Equivalent |

71%

From NCERT

AIPMT - 2008

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Two nuclei have their mass numbers in the ratio of \(1:3.\) The ratio of their nuclear densities would be:

1. \(1:3\)

2. \(3:1\)

3. \((3)^{1/3}:1\)

4. \(1:1\)

Subtopic: Nucleus |

78%

From NCERT

AIPMT - 2008

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

In the radioactive decay process, the negatively charged emitted β-particles are:

1. | the electrons present inside the nucleus |

2. | the electrons produced as a result of the decay of neutrons inside the nucleus |

3. | the electrons produced as a result of collisions between atoms |

4. | the electrons orbiting around the nucleus |

Subtopic: Types of Decay |

79%

From NCERT

AIPMT - 2007

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch