Question

Given below are two statements: one is labelled as Assertion

\mathbf{A}

and the other is labelled as Reason

\mathbf{R}

Assertion A: The nuclear density of nuclides

{ }_5^{10} \mathrm{~B}

,

{ }_3^6 \mathrm{Li},{ }_{26}^{56} \mathrm{Fe},{ }_{10}^{20} \mathrm{Ne}

and

{ }_{83}^{209} \mathrm{Bi}

can be arranged as

\rho_{\mathrm{Bi}}^{\mathrm{N}}>\rho_{\mathrm{Fe}_{\mathrm{N}}}^{\mathrm{N}}>\rho_{\mathrm{Ne}_{\mathrm{N}}}^{\mathrm{N}}>\rho_{\mathrm{B}}^{\mathrm{N}}>\rho_{\mathrm{Li}}^{\mathrm{N}}

Reason

\mathbf{R}

: The radius

R

of nucleus is related to its mass number

A

as

R=R_0 A^{1 / 3}

, where

R_0

is a constant.

In the light of the above statements, choose the correct answer from the options given below

Accepted Answer

$A$ is false but $R$ is true

Answer

Both $A$ and $R$ are true but $R$ is Not the correct explanation of $A$

Answer

$A$ is true but $R$ is false

Answer

Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

JEE PHYSICS MCQ: NUCLEI

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