AIPMT PRELIMS2001Chemistry-Chemical Kinetics
AIPMT PRELIMS 2001 Chemistry Rate Laws MCQ Question
Type: MCQ-numerical-Medium-Class 12
For the reaction 2N₂O₅ → 4NO₂ + O₂ rate and rate constant are 1.02 × 10⁻⁴ and 3.4 × 10⁻⁵ sec⁻¹ respectively. Then conc. of N₂O₅ at that time will be : -
A
732
B
3
C
02 × 10⁴
D
4 × 10⁵
Correct Answer
Option B
Detailed Explanation
Using the rate law for a first-order reaction, rate = k[N₂O₅]. Given rate and k, solve for [N₂O₅]: [N₂O₅] = rate/k = 1.02 × 10⁻⁴ / 3.4 × 10⁻⁵ = 1.732.
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