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Q. No.Boron has two isotopes and . If atomic weight of Boron is 10.81 then ratio of to in nature will be:
1. 15 : 16
2. 19: 81
3. 81 : 19
4. 20: 53
Subtopic: Mass-Energy Equivalent |
70%
Level 2: 60%+
AIPMT - 1998
Hints
For the nuclear reaction:
\({}_{92}^{235}\mathrm{U}+ {}_{0}^{1}\mathrm{n}\rightarrow {}_{56}^{144}\mathrm{Ba}+...+3{}_{0}^{1}\mathrm{n}\)
The blank space can be filled by:
\({}_{92}^{235}\mathrm{U}+ {}_{0}^{1}\mathrm{n}\rightarrow {}_{56}^{144}\mathrm{Ba}+...+3{}_{0}^{1}\mathrm{n}\)
The blank space can be filled by:
| 1. | \({}_{26}^{89}\mathrm{Kr}\) | 2. | \({}_{36}^{89}\mathrm{Kr}\) |
| 3. | \({}_{26}^{90}\mathrm{Sr}\) | 4. | \({}_{38}^{89}\mathrm{Sr}\) |
Subtopic: Nuclear Energy |
89%
Level 1: 80%+
AIPMT - 1998
Hints
Subtopic: Types of Decay |
72%
Level 2: 60%+
AIPMT - 1998
Hints
When \(\mathrm{X}\rightarrow {}_{7}^{14}\mathrm{N}+2\beta^{-}\) then the number of neutrons in \(\mathrm{X}\) will be:
1. \(3\)
2. \(5\)
3. \(7\)
4. \(9\)
1. \(3\)
2. \(5\)
3. \(7\)
4. \(9\)
Subtopic: Types of Decay |
61%
Level 2: 60%+
AIPMT - 1998
Hints
If a radioactive element emitted one \(\alpha\) and one \(\beta\text-\)particle, then the mass number of the daughter element is:
1. decreased by \(4\)
2. increased by \(4\)
3. decreased by \(2\)
4. increased by \(2\)
1. decreased by \(4\)
2. increased by \(4\)
3. decreased by \(2\)
4. increased by \(2\)
Subtopic: Types of Decay |
88%
Level 1: 80%+
AIPMT - 1999
Hints
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%
Level 2: 60%+
AIPMT - 2000
Hints
Nuclear–fission is best explained by:
| 1. | Liquid droplet theory. |
| 2. | Yukawa \(\pi\text-\)meson theory. |
| 3. | Independent particle model of the nucleus. |
| 4. | Proton-proton cycle. |
Subtopic: Nuclear Energy |
Level 3: 35%-60%
AIPMT - 2000
Hints
Subtopic: Types of Decay |
74%
Level 2: 60%+
AIPMT - 2001
Hints
\(M_n~\text{and}~M_p\) represent the mass of the neutron and proton respectively. An element having mass \(M\) has \(N\) neutrons and \(Z\)-protons, then the correct relation will be:
1. \(M <\left \{N.M_n+Z.M_p \right \}\)
2. \(M >\left \{N.M_n+Z.M_p \right \}\)
3. \(M =\left \{N.M_n+Z.M_p \right \}\)
4. \(M =N\left \{M_n+M_p \right \}\)
1. \(M <\left \{N.M_n+Z.M_p \right \}\)
2. \(M >\left \{N.M_n+Z.M_p \right \}\)
3. \(M =\left \{N.M_n+Z.M_p \right \}\)
4. \(M =N\left \{M_n+M_p \right \}\)
Subtopic: Nuclear Binding Energy |
83%
Level 1: 80%+
AIPMT - 2001
Hints
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