In the given nuclear reaction, the element \(\mathrm{X}\) is:

\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)

1. \({ }_{12}^{22} \mathrm{Mg}\)

2. \({ }_{11}^{23} \mathrm{Na}\)

3. \({ }_{10}^{23} \mathrm{Ne}\)

4. \(_{10}^{22}\textrm{Ne}\)

\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)

1. \({ }_{12}^{22} \mathrm{Mg}\)

2. \({ }_{11}^{23} \mathrm{Na}\)

3. \({ }_{10}^{23} \mathrm{Ne}\)

4. \(_{10}^{22}\textrm{Ne}\)

Subtopic: Types of Decay |

65%

From NCERT

NEET - 2022

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A radioactive nucleus \(_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}\) undergoes spontaneous decay in the sequence \(_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}\rightarrow \mathrm{B}_{\mathrm{Z-1}}\rightarrow \mathrm{C}_{\mathrm{Z-3}}\rightarrow \mathrm{D}_{\mathrm{Z-2}}\) where \(\mathrm{Z}\) is the atomic number of element \(\mathrm{X}\). The possible decay particles in the sequence are:

1. | \(\beta^{+}, ~\alpha, ~\beta^{-}\) | 2. | \(\beta^{-}, ~\alpha, ~\beta^{+}\) |

3. | \(\alpha, ~\beta^{-},~\beta^{+}\) | 4. | \(\alpha, ~\beta^{+},~\beta^{-}\) |

Subtopic: Types of Decay |

70%

From NCERT

NEET - 2021

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What happens to the mass number and the atomic number of an element when it emits \(\gamma\text{-}\)radiation?

1. | mass number decreases by four and atomic number decreases by two. |

2. | mass number and atomic number remain unchanged. |

3. | mass number remains unchanged while the atomic number decreases by one. |

4. | mass number increases by four and the atomic number increases by two. |

Subtopic: Types of Decay |

83%

From NCERT

NEET - 2020

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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

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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:

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

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

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

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

\({ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{X} \rightarrow { }_{\mathrm{Z}+1}^{\mathrm{A}} \mathrm{Y}\rightarrow { }_{\mathrm{Z-1}}^{\mathrm{A-4}} \mathrm{B}\rightarrow { }_{\mathrm{Z-1}}^{\mathrm{A-4}} \mathrm{B}\) 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

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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

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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

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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

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Which of the following rays are not electromagnetic waves?

1. \({X}\text-\)rays

2. \(\gamma\text-\)rays

3. \(\beta\text-\)rays

4. Heat rays

1. \({X}\text-\)rays

2. \(\gamma\text-\)rays

3. \(\beta\text-\)rays

4. Heat rays

Subtopic: Types of Decay |

57%

From NCERT

AIPMT - 2003

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A nuclear reaction is given by;

\({}_{Z}^{A}\mathrm{X}\rightarrow {}_{Z+1}^{A}\mathrm{Y}+{}_{-1}^{0}\mathrm{e}+\nu\)

represents:

1. \(\beta\text-\)decay

2. \(\gamma\text-\)decay

3. fusion

4. fission

\({}_{Z}^{A}\mathrm{X}\rightarrow {}_{Z+1}^{A}\mathrm{Y}+{}_{-1}^{0}\mathrm{e}+\nu\)

represents:

1. \(\beta\text-\)decay

2. \(\gamma\text-\)decay

3. fusion

4. fission

Subtopic: Types of Decay |

90%

From NCERT

AIPMT - 2003

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