Radioactivity
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PHXII13:NUCLEI

364038 Assertion :
In radioactive decay of a radioactive atom, its stability increases.
Reason :
It is a spontaneous process.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII13:NUCLEI

364039 A nucleus of \({U_{x_{1}}}\) has a half-life of 24.1 days. How long a sample of \({U_{x_{1}}}\) take to change to \({90 \%}\) of it to \({U_{x_{2}}}\) ?

1 \(30\,d\)
2 \(50\,d\)
3 \(90\,d\)
4 \(80\,d\)
PHXII13:NUCLEI

364040 The reciprocal of radioactive decay constant is called

1 Half-life period
2 Whole life period
3 Average life period
4 Avagadro number
PHXII13:NUCLEI

364041 A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is

1 \(0.2{\log _e}2\)
2 \(0.5{\log _e}2\)
3 \(0.6{\log _e}2\)
4 \(0.8{\log _e}2\)
MHTCET - 2017
PHXII13:NUCLEI

364042 The half-life of a radioactive substance is 48 hours. How much time will it take to disintegrate to its \(\frac{1}{{16}}th\) part?

1 \(16\,h\)
2 \(12\,h\)
3 \(192\,h\)
4 \(48\,h\)
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PHXII13:NUCLEI

364038 Assertion :
In radioactive decay of a radioactive atom, its stability increases.
Reason :
It is a spontaneous process.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII13:NUCLEI

364039 A nucleus of \({U_{x_{1}}}\) has a half-life of 24.1 days. How long a sample of \({U_{x_{1}}}\) take to change to \({90 \%}\) of it to \({U_{x_{2}}}\) ?

1 \(30\,d\)
2 \(50\,d\)
3 \(90\,d\)
4 \(80\,d\)
PHXII13:NUCLEI

364040 The reciprocal of radioactive decay constant is called

1 Half-life period
2 Whole life period
3 Average life period
4 Avagadro number
PHXII13:NUCLEI

364041 A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is

1 \(0.2{\log _e}2\)
2 \(0.5{\log _e}2\)
3 \(0.6{\log _e}2\)
4 \(0.8{\log _e}2\)
MHTCET - 2017
PHXII13:NUCLEI

364042 The half-life of a radioactive substance is 48 hours. How much time will it take to disintegrate to its \(\frac{1}{{16}}th\) part?

1 \(16\,h\)
2 \(12\,h\)
3 \(192\,h\)
4 \(48\,h\)
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PHXII13:NUCLEI

364038 Assertion :
In radioactive decay of a radioactive atom, its stability increases.
Reason :
It is a spontaneous process.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII13:NUCLEI

364039 A nucleus of \({U_{x_{1}}}\) has a half-life of 24.1 days. How long a sample of \({U_{x_{1}}}\) take to change to \({90 \%}\) of it to \({U_{x_{2}}}\) ?

1 \(30\,d\)
2 \(50\,d\)
3 \(90\,d\)
4 \(80\,d\)
PHXII13:NUCLEI

364040 The reciprocal of radioactive decay constant is called

1 Half-life period
2 Whole life period
3 Average life period
4 Avagadro number
PHXII13:NUCLEI

364041 A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is

1 \(0.2{\log _e}2\)
2 \(0.5{\log _e}2\)
3 \(0.6{\log _e}2\)
4 \(0.8{\log _e}2\)
MHTCET - 2017
PHXII13:NUCLEI

364042 The half-life of a radioactive substance is 48 hours. How much time will it take to disintegrate to its \(\frac{1}{{16}}th\) part?

1 \(16\,h\)
2 \(12\,h\)
3 \(192\,h\)
4 \(48\,h\)
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PHXII13:NUCLEI

364038 Assertion :
In radioactive decay of a radioactive atom, its stability increases.
Reason :
It is a spontaneous process.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII13:NUCLEI

364039 A nucleus of \({U_{x_{1}}}\) has a half-life of 24.1 days. How long a sample of \({U_{x_{1}}}\) take to change to \({90 \%}\) of it to \({U_{x_{2}}}\) ?

1 \(30\,d\)
2 \(50\,d\)
3 \(90\,d\)
4 \(80\,d\)
PHXII13:NUCLEI

364040 The reciprocal of radioactive decay constant is called

1 Half-life period
2 Whole life period
3 Average life period
4 Avagadro number
PHXII13:NUCLEI

364041 A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is

1 \(0.2{\log _e}2\)
2 \(0.5{\log _e}2\)
3 \(0.6{\log _e}2\)
4 \(0.8{\log _e}2\)
MHTCET - 2017
PHXII13:NUCLEI

364042 The half-life of a radioactive substance is 48 hours. How much time will it take to disintegrate to its \(\frac{1}{{16}}th\) part?

1 \(16\,h\)
2 \(12\,h\)
3 \(192\,h\)
4 \(48\,h\)
Join With Us for More Updates
PHXII13:NUCLEI

364038 Assertion :
In radioactive decay of a radioactive atom, its stability increases.
Reason :
It is a spontaneous process.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII13:NUCLEI

364039 A nucleus of \({U_{x_{1}}}\) has a half-life of 24.1 days. How long a sample of \({U_{x_{1}}}\) take to change to \({90 \%}\) of it to \({U_{x_{2}}}\) ?

1 \(30\,d\)
2 \(50\,d\)
3 \(90\,d\)
4 \(80\,d\)
PHXII13:NUCLEI

364040 The reciprocal of radioactive decay constant is called

1 Half-life period
2 Whole life period
3 Average life period
4 Avagadro number
PHXII13:NUCLEI

364041 A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is

1 \(0.2{\log _e}2\)
2 \(0.5{\log _e}2\)
3 \(0.6{\log _e}2\)
4 \(0.8{\log _e}2\)
MHTCET - 2017
PHXII13:NUCLEI

364042 The half-life of a radioactive substance is 48 hours. How much time will it take to disintegrate to its \(\frac{1}{{16}}th\) part?

1 \(16\,h\)
2 \(12\,h\)
3 \(192\,h\)
4 \(48\,h\)