STANDARDChemistry-Chemical Kinetics
STANDARD Chemistry Order of Reaction MCQ Question
Type: MCQ-conceptual-Medium-Class 12
If 50% of a reaction occurs in 100 seconds and 75% of the reaction occurs in 200 seconds, the order of this reaction is:
A
1
B
2
C
zero
D
3
Correct Answer
Option A
Detailed Explanation
t₁/₂ = 100 second (50% reaction). After 200 seconds, 75% of reaction will be completed, i.e., t₃/₄ = 200 seconds. Thus, it follows first order kinetics as half-life is independent of concentration and follows the relation, t₃/₄ = 2 × t₁/₂.
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