NEET Last 32 Years Solved 1988 – 2019 Physics and Chemistry Video Solutions
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The activity of a radioactive sample is measured as N0 counts per minute at t=0 and N0/e counts per minute at t=5 min. The time, (in minute) at which the activity reduces to half its value, is
22
Aug
The activity of a radioactive sample is measured as N0 counts per minute at t=0 and N0/e counts per minute at t=5 min. The time, (in minute) at which the activity reduces to half its value, is (in minute) at which the activity reduces to half its value is The activity of a radioactive sample [...]
The half-life of a radioactive isotope X is 50 years. It decays to another element Y which is stable. The two elements X and Y were found to be in the ratio of 1:15 in a sample of a given rock. The age of the rock was estimated to be
22
Aug
The half-life of a radioactive isotope X is 50 years. It decays to another element Y which is stable. The two elements X and Y were found to be in the ratio of 1:15 in a sample of a given rock. The age of the rock was estimated to be The nuclei of which one [...]
The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element ‘Y’ which is stable. The two elements ‘X’ and ‘Y’ were found to be in the ratio 1:7 in a sample of a given rock. The age of the rock is estimated to be
22
Aug
The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element ‘Y’ which is stable. The two elements ‘X’ and ‘Y’ were found to be in the ratio 1:7 in a sample of a given rock. The age of the rock is estimated to be The nuclei of which one [...]
The half-life of a radioactive substance is 30 minutes, The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is.
22
Aug
The half-life of a radioactive substance is 30 minutes, The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is. The half-life of a radioactive substance is 30 minutes The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is. August 22, 2020 [...]
The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 x 10^9 s is 10^10 s-1. The number of radioactive atoms in that sample at that instant is
22
Aug
The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 x 10^9 s is 10^10 s-1. The number of radioactive atoms in that sample at that instant is The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 x 10^9 s is 10^10 [...]
The nuclei of which one of the following pairs of nuclei are isotones ?
22
Aug
The nuclei of which one of the following pairs of nuclei are isotones ? The nuclei of which one of the following pairs of nuclei are isotones ? August 22, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
The binding energy of deuteron is 2.2MeV and that of He is 28 MeV. If two deuterons are fused to form one He then the energy released is:
22
Aug
The binding energy of deuteron is 2.2MeV and that of He is 28 MeV. If two deuterons are fused to form one He then the energy released is: The binding energy of deuteron is 2.2MeV and that of He is 28 MeV. If two deuterons are fused to form one He then the energy released [...]
In a radioactive material the activity at time t1 is R1 and at a later time t2, it is R2. If the decay constant of the material is λ, then
22
Aug
In a radioactive material the activity at time t1 is R1 and at a later time t2, it is R2. If the decay constant of the material is λ, then In a radioactive material the activity at time t1 is R1 and at a later time t2 it is R2. If the decay constant of [...]
In radioactive decay process, the negatively changed emitted β−particle are
22
Aug
In radioactive decay process, the negatively changed emitted β−particle are In radioactive decay process the negatively changed emitted β−particle are August 22, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
Two radioactive substances A and B have decay constants 5 λ and λ respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)^2 after a time interval
22
Aug
Two radioactive substances A and B have decay constants 5 λ and λ respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)^2 after a time interval Radioactive material 'A' has decay constant '8λ' and material 'B' has decay constant [...]