AIPMT PRELIMS 2008 Chemistry Rate Laws MCQ Question

The bromination of acetone that occurs in acid solution is represented by this equation. CH₃COCH₃(aq) + Br₂(aq) → CH₃COCH₂Br(aq) + H⁺(aq) + Br⁻(aq) These kinetic data were obtained from given reaction concentrations. Initial concentrations, (M)

[CH₃COCH₃]	[Br₂]	[H⁺]
0.30	0.05	0.05
0.30	0.10	0.05
0.30	0.10	0.10
0.40	0.05	0.20

Initial rate, disappearance of Br₂, M/s 5.7 × 10⁻⁵ 5.7 × 10⁻⁵ 5.7 × 10⁻⁵ 1.2 × 10⁻⁴ 3.1 × 10⁻⁴ Based on these data, the rate equation is :