The number of incorrect statement/s from the following is ______________ A. The successive half lives of zero order reactions decreases with time. B. A substance appearing as reactant in the chemical equation may not affect the rate of reaction C. Order and molecularity of a chemical reaction can be a fractional number D. The rate constant units of zero and second order reaction are molL - 1 s - 1 and mol - 1 L s - 1 respectively

Question

The number of incorrect statement/s from the following is ______________ A. The successive half lives of zero order reactions decreases with time. B. A substance appearing as reactant in the chemical equation may not affect the rate of reaction C. Order and molecularity of a chemical reaction can be a fractional number D. The rate constant units of zero and second order reaction are molL - 1 s - 1 and mol - 1 L s - 1 respectively,

MARKS App · Accepted Answer

A. C 0 ⟶ t = C 0 2 k C 0 2 ⟶ t = C 0 4 k C 0 4 ⟶ t = C 0 8 k C 0 8 Successive half lives of zero order reactions decreases with time Note: successive half lives of first order reactions remains same B. For zero order reactions, the rate of reaction is independent on the concentration of reactants. C. In some reaction molecularity (theoretical value) may be equal to the order of a reaction (experimental value). The order of a reaction may be fractional, zero, positive or negative. Molecularity can never be fractional. (D) Unit of k = Units of rate units of concentration order Zero order = mollit - 1 sec - 1 Second order = mol - 1 lit - 1

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