A radioactive substance is dissolved in a liquid and the solution i...

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A radioactive substance is dissolved in a liquid and the solution is heated. The activity of the solution
(A) is smaller than that of element
\( \mathrm{P} \)
(B) is greater than that of element
(C) is equal to that of element
W
(D) will be smaller or greater depending upon whether the solution is weak or concentrated.
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