AIPMT 2008 Physics and Chemistry Paper

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,Ms−1
5.7×10−5
5.7×10−5
1.2×10−4
3.1×10−4
Based on these data, the rate equation is :