In a zero order reaction, the rate
Correct answer: B. is independent of the concentration of the reactant
- A. doubles when the concentration doubles
- B. is independent of the concentration of the reactant
- C. falls to zero immediately
- D. is proportional to the square of the concentration
Explanation
A zero order reaction proceeds at a constant rate until the reactant is nearly exhausted, because something other than concentration limits it, typically a saturated catalyst surface or a fixed light intensity. The graph of concentration against time is therefore a straight line with a constant slope. Enzyme catalysed reactions become zero order once every active site is occupied.
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About Order of Reaction
Reaction order shows how the rate depends on the concentration of each reactant, as expressed in the rate law. Coverage includes zero, first and second-order reactions, integrated rate equations, half-life, units of rate constants and the distinction between overall order and molecularity.
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