Two isotopes `P` and `Q` atomic weight `10` and `20`, respectively are mixed in equal amount by weight. After `20` days their weight ratio is found to be `1:4`. Isotope `P` has a half-life of `10` days. The half-life of isotope `Q` is

Two radio isotopes A and B of atomic mass X and Y are mixed in equal amount by mass. After 20 days , their mass ratio is found to be 1:4 . Isotope A has a half-life of 1 day. The half-life of isotope B is :

Two radio isotopes A and B of atomic mass X and Y are mixed in equal amount by mass. After 20 days , their mass ratio is found to be 1:4 . Isotope A has a half-life of 1 day. The half-life of isotope B is : a) 1.11 days b) 0.11 (X)/(Y) day c) 0.6237 day d) 1.10 day

If 2g of an isotope has a half - life of 7 days, the half life of 1g sample is

If 2g of an isotope has a half - life of 7 days, the half life of 1g sample is

If 5 g of an isotope sample has a half life of 30 days, the half life of 2 g of sample is :

Two radioactive isotopes A and B of atomic mass X and Y are mixed in equal amount by mass. After 20 days, their mass ratio is found to be 1: 4. Half life of 'A' is 1 day. What will be the half life of B ?