NEET UG PHYSICS MCQ: NUCLEI

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Understanding +4 | -1

Assertion: In

{U}_{\mathrm{235}}

fission reaction neutrons are required to be slowed down.
Reason: The probability of capture of slow moving neutrons is high for

{U}_{\mathrm{235}}

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

Option A is correct because slow neutrons have a higher probability of being captured by U-235 nuclei, leading to nuclear fission, which is essential for sustaining a chain reaction in a nuclear reactor.

More Questions from NUCLEI

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The ratio of the nuclear radii of elements with mass numbers

\mathrm{216}

and

\mathrm{125}

is In a hypothetical fission reaction

{ }_{92} X^{236} \rightarrow{ }_{56} Y^{141}+{ }_{36} Z^{92}+3 R

The identity of emitted particles

({R})

is: The radius of the nucleus of the atom with A=216 is (take

{R_0}\; = \mathrm{ }1.3fm

) The correct sequence of the increasing wavelength of the given radiation sources is Which of the following nuclear fragments corresponding to nuclear fission between neutron

\left({ }_0^1 \mathrm{n}\right)

and uranium isotope

\left({ }_{92}^{235} \mathrm{U}\right)

is correct: Which of the following has the mass closest in value to that of the positron

1\,\,a.m.u = 931\,\,MeV