AIPMT MAINS2008Chemistry-Chemical Kinetics
AIPMT MAINS 2008 Chemistry Rate Laws MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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 for 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 0.05 0.05 0.20 Initial rate, disappearance of Br₂, M s⁻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
A
Rate = k[CH₃COCH₃][Br₂][H⁺]
B
Rate = k[CH₃COCH₃][H⁺]
C
Rate = k[CH = COCH₃][Br₂]
D
Rate = k[CH₃COCH₃][Br₂][H⁺]²
Correct Answer
Option B
Detailed Explanation
In experiment (1) and (2), rate doesn't depend on the concentration of Br₂. So, rate expression will not include [Br₂].
Found an issue with this question?