Q. No.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 |
59%
From NCERT
AIPMT - 2003
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An excited heavy nucleus \(^A_Z \mathrm{X}\) emits radiations in the following sequence:
\(^A_Z \mathrm{X}\rightarrow ^{A-4}_{Z-2}\mathrm{D_1}\rightarrow ^{A-4}_{Z-1}\mathrm{D_2}\rightarrow ^{A-8}_{Z-3}\mathrm{D_3}\rightarrow ^{A-8}_{Z-4}\mathrm{D_4}\rightarrow ^{A-8}_{Z-4}\mathrm{D_5}\)
where \(Z,A\) are the atomic and mass number of element \(\mathrm{X},\) respectively. The possible emitted particles or radiations in the sequence, respectively are:
\(^A_Z \mathrm{X}\rightarrow ^{A-4}_{Z-2}\mathrm{D_1}\rightarrow ^{A-4}_{Z-1}\mathrm{D_2}\rightarrow ^{A-8}_{Z-3}\mathrm{D_3}\rightarrow ^{A-8}_{Z-4}\mathrm{D_4}\rightarrow ^{A-8}_{Z-4}\mathrm{D_5}\)
where \(Z,A\) are the atomic and mass number of element \(\mathrm{X},\) respectively. The possible emitted particles or radiations in the sequence, respectively are:
| 1. | \(e^+, \alpha, e^-, \alpha , \gamma \) | 2. | \(e^-, \alpha, e^+, \alpha , \gamma \) |
| 3. | \(\alpha ,e^-, \alpha, e^+, \gamma \) | 4. | \(\alpha ,e^+, \alpha, e^-, \gamma \) |
Subtopic: Types of Decay |
68%
From NCERT
NEET - 2024
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When a deuterium is bombarded on \({}_{8}^{16}\mathrm{O}\) nucleus, an \(\alpha\text-\)particle is emitted, then the product nucleus is:
| 1. | \({}_{7}^{13}\mathrm{N}\) | 2. | \({}_{5}^{10}\mathrm{B}\) |
| 3. | \({}_{4}^{9}\mathrm{Be}\) | 4. | \({}_{7}^{14}\mathrm{N}\) |
Subtopic: Types of Decay |
77%
From NCERT
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\({}_{10}^{22}\mathrm{Ne}\) nucleus after absorbing energy decays into two \(\alpha \text{-particle}\) and an unknown nucleus. The unknown nucleus is:
1. Nitrogen
2. Carbon
3. Boron
4. Oxygen
1. Nitrogen
2. Carbon
3. Boron
4. Oxygen
Subtopic: Types of Decay |
71%
From NCERT
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An element \(\mathrm{X}\) decays, first by positron emission, and then two \(\alpha\text-\)particles are emitted in successive radioactive decay. If the product nuclei have a mass number \(229\) and atomic number \(89\), the mass number and the atomic number of element \(\mathrm{X}\) are:
1. \(237,~93\)
2. \(237,~94\)
3. \(221,~84\)
4. \(237,~92\)
Subtopic: Types of Decay |
59%
From NCERT
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After two alpha decays and four beta(-ve) decays, the atomic number:
| 1. | decreases by \(4\) and the mass number remains the same. |
| 2. | remains the same but the mass number increases by \(4.\) |
| 3. | remains the same but the mass number decreases by \(8.\) |
| 4. | increases but the mass number remains the same. |
Subtopic: Types of Decay |
85%
From NCERT
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\({}_{8}^{19}\mathrm{O}\rightarrow {}_{9}^{19}\mathrm{F}+\mathrm{A}+\mathrm{B}\)
In the given decay equation, \(\mathrm{A}\) and \(\mathrm{B}\) indicate:
In the given decay equation, \(\mathrm{A}\) and \(\mathrm{B}\) indicate:
| 1. | Electron and antineutrino |
| 2. | Positron and antineutrino |
| 3. | Positron and neutrino |
| 4. | Electron and positron |
Subtopic: Types of Decay |
67%
From NCERT
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For the given reaction, the particle \(\mathrm{X}\) is:
\({ }_6^{11} \mathrm{C}\rightarrow { }_5^{11}\mathrm{B}+\beta^{+}+\mathrm{X}\)
1. neutron
2. anti-neutrino
3. neutrino
4. proton
Subtopic: Types of Decay |
66%
From NCERT
AIPMT - 2000
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In the given nuclear reaction, the element \(\mathrm{X}\) is:
\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)
\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)
| 1. | \({ }_{12}^{22} \mathrm{Mg}\) | 2. | \({ }_{11}^{23} \mathrm{Na}\) |
| 3. | \({ }_{10}^{23} \mathrm{Ne}\) | 4. | \(_{10}^{22}\textrm{Ne}\) |
Subtopic: Types of Decay |
67%
From NCERT
NEET - 2022
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A free neutron decays into a proton, an electron and:
1. A beta particle.
2. An alpha particle.
3. An antineutrino.
4. A neutrino.
Subtopic: Types of Decay |
64%
From NCERT
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