Nucleus Nuclei 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

The nuclear radius of a

_{3}^{8} L i

${ }_{3}^{8} \mathrm{L i}$ nucleus is

2.2 fm

$2.2~\text{fm}$ . The nuclear radius of

_{30}^{64} Z n

${ }_{30}^{64} \mathrm{Zn}$ is nearly:
1.

4.4 fm

$4.4~\text{fm}$
2.

7 fm

$7~\text{fm}$
3.

22 fm

$22~\text{fm}$
4.

17.6 fm

$17.6~\text{fm}$

Subtopic: Nucleus |

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Q2:

Expression for the average radius of a nucleus and hence the radius of a given hypothetical nucleus

_{27}^{64} X

$^{64}_{27}\mathrm{X}$ will respectively be:
[given that

R_{0} = 1.1 fm

$R_0=1.1~\text{fm}$ ]
1.

R = R_{0} A^{\frac{1}{2}},

$R=R_0A^{\frac{1}{2}},$

8.8 fm

$8.8 ~\text{fm}$
2.

R = R_{0} A^{\frac{1}{3}},

$R=R_0A^{\frac{1}{3}},$

4.4 fm

$4.4~\text{fm}$
3.

R = R_{0} A^{\frac{1}{3}},

$R=R_0A^{\frac{1}{3}},$

3.3 fm

$3.3~\text{fm}$
4.

R = R_{0} A^{\frac{1}{6}},

$R=R_0A^{\frac{1}{6}},$

2.2 fm

$2.2~\text{fm}$

Subtopic: Nucleus |

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Q3:

The radius of a nucleus

(r)

$(r)$ is directly proportional to the cube-root of the number of nucleons

(N) .

$(N).$ Assume that the mass of a nucleon is fixed

(m_{n}) .

$(m_n).$ The density

(ρ)

$(\rho)$ of a nucleus varies as:
1.

N^{3}

$N^3$
2.

N^{1}

$N^1$
3.

N^{0}

$N^0$
4.

N^{- 1}

$N^{-1}$

Subtopic: Nucleus |

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Q4:

A nucleus of mass number

189

$189$ splits into two nuclei having mass numbers

125

$125$ and

64.

$64.$ The ratio of the radius of two daughter nuclei respectively is:
1.

25 : 16

$25:16$
2.

1 : 1

$1:1$
3.

4 : 5

$4:5$
4.

5 : 4

$5:4$

Subtopic: Nucleus |

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NEET - 2022

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Q5:

A stationary nucleus breaks into two daughter nuclei, which move with velocities in the ratio

3 : 2.

$3:2.$ What is the ratio of their nuclear radii?

1.	$\left ( \dfrac{2}{3} \right )^{1/2}$	2.	$\left ( \dfrac{2}{3} \right )^{1/3}$
3.	$\left ( \dfrac{4}{9} \right )^{1/3}$	4.	$\left ( \dfrac{9}{4} \right )^{1/2}$

Subtopic: Nucleus |

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Q6:

The four graphs show different possible relationships between $\text{ln}\left(\dfrac{{R}}{{R}_0}\right)$ and $\text{ln}(A).$
(where $R$ is the radius of a nucleus and $A$ is the mass number of the nucleus)
Which of these graphs (1, 2, 3, or 4) correctly represents the relationship between these nuclear parameters?

1.		2.
3.		4.

Subtopic: Nucleus |

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Q7:

Atoms have different atomic numbers as well as different mass numbers but have the same number of neutrons is called:

1.	isotopes	2.	isobars
3.	isotones	4.	isodiaphers

Subtopic: Nucleus |

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Q8:

The ratio of nuclear densities and nuclear volumes of

_{26}^{56} F e

$^{56}_{26}Fe$ and

_{2}^{4} H e

$^{4}_{2}He$ are, respectively:
1.

13 : 1

$13:1$ and

14 : 1

$14:1$
2.

14 : 1

$14:1$ and

1 : 1

$1:1$
3.

1 : 1

$1:1$ and

14 : 1

$14:1$
4.

1 : 1

$1:1$ and

13 : 1

$13:1$

Subtopic: Nucleus |

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Q9:

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 |

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