Past Year (1998 - 2005) MCQs Nuclei Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Q1:

Boron has two isotopes ${}_{5}B^{10}$ ${}_{5}B^{10}$ and ${}_{5}B^{11}$ ${}_{5}B^{11}$ . If atomic weight of Boron is 10.81 then ratio of ${}_{5}B^{10}$ ${}_{5}B^{10}$ to ${}_{5}B^{11}$ ${}_{5}B^{11}$ in nature will be:

1. 15 : 16

2. 19: 81

3. 81 : 19

4. 20: 53

Subtopic: Mass-Energy Equivalent |

68%

From NCERT

AIPMT - 1998

1

2

3

4

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Q2:

For the nuclear reaction:

_{92}^{235} U +_{0}^{1} n \to_{56}^{144} B a + . . . + 3_{0}^{1} n

${}_{92}^{235}\mathrm{U}+ {}_{0}^{1}\mathrm{n}\rightarrow {}_{56}^{144}\mathrm{Ba}+...+3{}_{0}^{1}\mathrm{n}$
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%

From NCERT

AIPMT - 1998

1

2

3

4

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Q3:

${}_{n}X_{m}$ ${}_{n}X_{m}$ emitted one $α and 2 β$ $α and 2 β$ particles, then it will become:

1. ${}_{n}X_{m - 4}$ ${}_{n}X_{m - 4}$

2. ${}_{n - 1}X_{m - 1}$ ${}_{n - 1}X_{m - 1}$

3. ${}_{n}Z_{m - 4}$ ${}_{n}Z_{m - 4}$

4. None of these

Subtopic: Types of Decay |

71%

From NCERT

AIPMT - 1998

1

2

3

4

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Q4:

When

X \to_{7}^{14} N + 2 β^{-}

$\mathrm{X}\rightarrow {}_{7}^{14}\mathrm{N}+2\beta^{-}$ then the number of neutrons in

X

$\mathrm{X}$ will be:
1.

3

$3$
2.

5

$5$
3.

7

$7$
4.

9

$9$

Subtopic: Types of Decay |

61%

From NCERT

AIPMT - 1998

1

2

3

4

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Q5:

If a radioactive element emitted one

α

$\alpha$ and one

β -

$\beta\text-$ particle, then the mass number of the daughter element is:
1. decreased by

4

$4$
2. increased by

4

$4$
3. decreased by

2

$2$
4. increased by

2

$2$

Subtopic: Types of Decay |

88%

From NCERT

AIPMT - 1999

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2

3

4

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Q6:

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

1

2

3

4

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Q7:

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 |

From NCERT

AIPMT - 2000

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2

3

4

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Q8:

Which rays contain (+ve) charged particle:
1. α-rays
2. β-rays
3. γ-rays
4. X-rays

Subtopic: Types of Decay |

73%

From NCERT

AIPMT - 2001

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2

3

4

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Q9:

$If X (n,$ $If X (n,$ $α$ $α$ $) converts into$ $) converts into$ ${}_{3}^{7}L i$ ${}_{3}^{7}L i$ , then X will be:

1. ${}_{5}^{10}B$ ${}_{5}^{10}B$

2. ${}_{5}^{9}B$ ${}_{5}^{9}B$

3. ${}_{4}^{11}B e$ ${}_{4}^{11}B e$

4. ${}_{2}^{4}H e$ ${}_{2}^{4}H e$

Subtopic: Types of Decay |

60%

From NCERT

AIPMT - 2001

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2

3

4

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Q10:

M_{n} and M_{p}

$M_n~\text{and}~M_p$ represent the mass of the neutron and proton respectively. An element having mass

M

$M$ has

N

$N$ neutrons and

Z

$Z$ -protons, then the correct relation will be:
1.

M < {N . M_{n} + Z . M_{p}}

$M <\left \{N.M_n+Z.M_p \right \}$
2.

M > {N . M_{n} + Z . M_{p}}

$M >\left \{N.M_n+Z.M_p \right \}$
3.

M = {N . M_{n} + Z . M_{p}}

$M =\left \{N.M_n+Z.M_p \right \}$
4.

M = N {M_{n} + M_{p}}

$M =N\left \{M_n+M_p \right \}$

Subtopic: Nuclear Binding Energy |

82%

From NCERT

AIPMT - 2001

1

2

3

4

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