A. The rate constant of a reaction is equal to rate of reaction: (a) When concentrations of reactants do not change with time. (b) When concentrations of all reactants and products are equal. (c) At time t = 0. (d) When concentrations of all reactants are unity. B. If the concentration of the reactants in the reaction 2 A + B A C + D is increased by three folds, the rate of the reaction will be increased by (a) 27 times (b) 9 times (c) 64 times (d) 01 times
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