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Solution


Q.

A radioactive material P first decays into Q and then Q decays to non-radioactive material R. Which of the following figure represents time dependent mass of P, Q and R      [2025]
1  
2  
3  
4  

Ans.

(2)

P→Q→R

Final mass of R will be equal to initial mass of P and mass of P is continuously decreasing with time.