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A vessel has two compartments connected ...

A vessel has two compartments connected at the top. In one compartment (B), radioactive methyl ioddide `(overset(**)(C)H_(3)I)` is placed while in other compartment (A). Normal methly iodide `"("CH_(3)I")"` is placed. Will the vapours over (A) and (B) become radioactive ? Will the radioactivity spread to the liquid in compartment A? Discuss in terms of dynamic nature of the equilibrium between the vapours and the liquid.

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(i) yes the vapours over both the compartments (A) and (B) will become radioactive. The space above (B) is also expected to contain the vapours of radioactive methyl iodide `(CH_(3)I)` since the vapours from one compartment can easily move into the space above the other compartment. This means that the vapours in the space above A and B will become radioactive.
(ii) Since evaporation is a reversible process , the vapours of radioactive `overset(**)(C)H_(3)I` condense and the compartment A as well. The liquid in the compartment A will also become radioactive.
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