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A student has studied the decomposition of a gas AB3 at 25°C. He obtained the following data. p (mm Hg): 50, 100, 200, 400 relative t1/2 (s): 4, 2, 1, 0.5 The order of the reaction is
- 1
- 0 (Zero)
- 2
- 0.5
Correct answer: 2
Solution
The data shows that as the pressure of the gas AB3 increases, the half-life decreases in a manner consistent with a second-order reaction, where the half-life is inversely proportional to the concentration of the reactant.
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