Given below are two statements:
 Assertion (A): The density of nucleus is much higher than that of ordinary matter. Reason (R): Most of the mass of the atom is concentrated in the nucleus while the size of this nucleus is almost $$10^5$$ times smaller.
 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True but (R) is False. 4 Both (A) and (R) are False.
Subtopic: Â Nucleus |
From NCERT
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Graph given below shows the variation of binding energy per nucleon, Ebn as a function of mass number. For nuclei with mass number A such that, 30 < A < 170, Ebn is almost constant because nuclear forces are:

1. Short-ranged

2. Medium-ranged

3. Long-ranged

4. None of the above

Subtopic: Â Nuclear Binding Energy |
Â 71%
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Graph gives the variation of potential energy of a pair of nucleons as a function of their separation, r. From the graph it can be concluded that the force between nucleons is attractive for distances:

1. Less than ro

2. Greater than ro

3. Less than $\frac{{r}_{o}}{2}$

4. Less than $\frac{{r}_{o}}{4}$

Subtopic: Â Nuclear Binding Energy |
Â 57%
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NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements:
 Assertion (A): Radioactive nuclei emits $$\beta^- -$$ particles. Reason (R): Electrons exist inside the nucleus.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 (A) is false but (R) is true.
Subtopic: Â Types of Decay |
Â 75%
From NCERT
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Given below are two statements:
 Assertion (A): Forces (nuclear) acting between proton-proton $$(\mathrm{f}_{\mathrm{pp}})$$,  proton-neutron $$(\mathrm{f}_{\mathrm{pn}})$$ and neutron-neutron $$(\mathrm{f}_{\mathrm{nn}})$$ are such that $$\mathrm{f}_{\mathrm{pp}}<\mathrm{f}_{\mathrm{pn}}=\mathrm{f}_{\mathrm{nn}}$$. Reason (R): Electrostatic force of repulsion between two protons reduces nuclear forces between them.

 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True but (R) is False. 4 Both (A) and (R) are False.

Subtopic: Â Nuclear Binding Energy |
Â 63%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements:
 Assertion (A): The mass of $$\beta$$-particles when they are emitted is higher than the mass of electrons obtained by other means. Reason (R): $$\beta$$-particles and electrons, both are similar particles.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic: Â Types of Decay |
From NCERT
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Given below are two statements:
 Assertion (A): Electron capture occurs more than positron emission in a heavy nucleus. Reason (R): In a heavy nucleus, electrons are relatively close to the nucleus.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic: Â Types of Decay |
Â 64%
From NCERT
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Given below are two statements:
 Assertion (A): All nuclei are not of the same size. Reason (R): The size of the nucleus depends on atomic mass.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic: Â Nucleus |
Â 78%
From NCERT
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Given below are two statements:
 Assertion (A): The ratio of time taken for light emission from an atom to that for the release of nuclear energy in fission is 1:100. Reason (R): Time taken for the light emission from an atom is of the order of 10-8s.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic: Â Nuclear Energy |
Â 57%
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Given below are two statements:
 Assertion (A): 90Sr from radioactive fallout from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells. Reason (R): The energetic $$\beta$$-particles emitted in the decay of 90Sr damage the bone marrow.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.
.
Subtopic: Â Types of Decay |
Â 88%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh