MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryChemical kineticsDifferential and Integral Forms of Rate Law

For a general reaction X -> Y, the plot of conc. of X vs time is given in the figure. What is the order of the reaction and what are the units of rate constant?

A.Zero, mol L–1 s–1✓ Correct

B.First, mol L–1 s–1

C.First, s–1

D.Zero, L mol–1 s–1

Explanation

0 kt A A e [Integrated rate law] Integrated Rate Law for zero-order reaction, 0 t A A kt Rearranging this, 0 t A A kt which is in the form y mx c m k 0 c A Graph of this plot exactly looks like graph in question. Thus, reaction is zero-order and unit of rate constant, k 1 1 = mole L s

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