Solved Sample Paper 1 — Question 25

(a) Agriculture — Radioisotopes are used to trace and study the uptake of nutrients by plants. For example, the use of radioactive phosphorous ³²P in fertilizers has revealed how phosphorous is absorbed by plants.

(b) Industries — Radio isotopes such as $^{235}_{\space \space 92}\text{U}$ are used as fuel for atomic energy reactors.