Chapter 31 – Nuclei
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The count rate of a Geiger Muller counter for the radiation of a radioactive material of half-life 30 min decreases to 5s−1 after 2h. The initial count rate was
16
Aug
The count rate of a Geiger Muller counter for the radiation of a radioactive material of half-life 30 min decreases to 5s−1 after 2h. The initial count rate was The count rate of a Geiger Muller counter for the radiation of a radioactive material of half-life 30 min decreases to 5s−1 after 2h. The initial [...]
Half-lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes. Initially, he sample of A and B have equal number of nuclei. After 80 minutes the ratio of the remaining number of A and B nuclei is :
16
Aug
Half-lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes. Initially, he sample of A and B have equal number of nuclei. After 80 minutes the ratio of the remaining number of A and B nuclei is : Half-lives of two radioactive substances A and B are respectively 20 minutes [...]
The relationship between disintegration constant ( λ ) and half-life ( T ) will be
16
Aug
The relationship between disintegration constant ( λ ) and half-life ( T ) will be The relationship between disintegration constant ( λ ) and half-life ( T ) will be August 16, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
The half-life of a radioactive material is 3 h. If the initial amount is 300 g, then after 18 h, it will remain
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Aug
The half-life of a radioactive material is 3 h. If the initial amount is 300 g, then after 18 h, it will remain it will remain The half-life of a radioactive material is 3 h. If the initial amount is 300 g then after 18 h August 16, 2020 Category: Chapter 31 - Nuclei , [...]
Half-life period of a radioactive substance is 6h. After 24h activity is 0.01μC, what was the initial activity ?
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Aug
Half-life period of a radioactive substance is 6h. After 24h activity is 0.01μC, what was the initial activity ? Half-life period of a radioactive substance is 6h. After 24h activity is 0.01μC what was the initial activity ? August 16, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 [...]
Half-life of a radioactive substance is 12.5 h and its mass is 256 g. After what time, the amount of remaining substance is 1 g ?
16
Aug
Half-life of a radioactive substance is 12.5 h and its mass is 256 g. After what time, the amount of remaining substance is 1 g ? Half-life of a radioactive substance is 12.5 h and its mass is 256 g. After what time the amount of remaining substance is 1 g ? August 16, 2020 [...]
A sample of radioactive elements contains 4×1010 active nuclei. If half-life of element is 10 days, then the number of decayed nuclei after 30 days is
16
Aug
A sample of radioactive elements contains 4×1010 active nuclei. If half-life of element is 10 days, then the number of decayed nuclei after 30 days is A sample of radioactive elements contains 4×1010 active nuclei. If half-life of element is 10 days then the number of decayed nuclei after 30 days is August 16, 2020 [...]
A sample of a radioactive element has a mass of 10g at an instant t=0. The approximate mass of this element in the sample after two mean lives is .
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Aug
A sample of a radioactive element has a mass of 10g at an instant t=0. The approximate mass of this element in the sample after two mean lives is . A sample of a radioactive element has a mass of 10g at an instant t=0. The approximate mass of this element in the sample after [...]
The half-life of radium is about 1600yr. Of 100 g of radium existing now, 25 g will remain unchanged after
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Aug
The half-life of radium is about 1600yr. Of 100 g of radium existing now, 25 g will remain unchanged after 25 g will remain unchanged after The half-life of radium is about 1600yr. Of 100 g of radium existing now August 16, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 [...]
A radioactive sample with a half-life of 1 month has the label : ‘Activity= 2 micro curie on 1-8-1991’. What would be its activity two months earlier?
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Aug
A radioactive sample with a half-life of 1 month has the label : ‘Activity= 2 micro curie on 1-8-1991’. What would be its activity two months earlier? A radioactive sample with a half-life of 1 month has the label : 'Activity= 2 micro curie on 1-8-1991'. What would be its activity two months earlier? August [...]