WB JEE
Chemistry
Previous Years Questions

For the reaction $$_7^{14}N(\alpha ,p)\,{}^{17}O$$, 1.16 MeV (Mass equivalent = 0.00124 amu) of energy is absorbed. Mass on the reactant side is 18.00...
The half-life period of $${}_{53}{I^{125}}$$ is 60 days. The radioactivity after 180 days will be
Consider, the radioactive disintegration $${}_{82}{A^{210}}\buildrel {} \over \longrightarrow B\buildrel {} \over \longrightarrow C\buildrel {} \ove... Which atomic species cannot be used as a nuclear fuel? The half-life of C14 is 5760 years. For a 200 mg sample of C14, the time taken to change to 25 mg is The nucleus$$_{29}^{64}Cu accepts an orbital electron to yield,