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  • 1(current)
Q. No.
Given below are two statements: 
Assertion (A): Radioactive nuclei emits \(\beta^{-} \text-\) 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:  Types of Decay |
 80%
From NCERT
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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:  Types of Decay |
 51%
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:  Types of Decay |
 66%
From NCERT
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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:  Types of Decay |
 89%
From NCERT
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Given below are two statements: 
Assertion (A): Photoelectrons and \(\beta^-\) particles are similar.
Reason (R):  \(\beta^-\) particles possess exactly the same kinetic energy as that of photoelectrons.
 
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:  Types of Decay |
From NCERT
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Given below are two statements: 
Assertion (A): Isotopes of an element can be separated by using a mass spectrometer.
Reason (R): Separation of isotopes is possible because of the difference in electron numbers of isotopes.
 
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:  Types of Decay |
 66%
From NCERT
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