The rate law for a reaction describes how the rate of the reaction depends on the concentration of the reactants. The rate law is determined experimentally and is generally given by the expression: Rate =k[‌ Reactant1]m[‌ Reactant2]n[‌Reactant3]p... where k is the rate constant and m,n,p, etc., are the reaction orders with respect to each reactant. For the given reaction, CHCl3(g)+Cl2(g)⟶CCl4(g)+HCl(g), the order of reaction with respect to CHCl3(g) is one, and the order with respect to Cl2(g) is ‌
1
2
. Therefore, the rate law can be expressed as: ‌ Rate ‌=k[CHCl3]1[Cl2]‌
1
2
‌. ‌ Comparing this expression to the given options, the correct rate law corresponds to: Option A: ‌ Rate ‌=k[CHCl3][Cl2]1∕2