JEE Mains · Chemistry · STD 12 - 3. Chemical kinetics
Consider the given graph showing variation of reactant concentration with time.
Three different reactions were started with identical initial concentration of reactants. Which of the following statement is correct?
- A The order of all the three reactions is same.
- B The rate constant of reaction \(3\) is larger than the rate constant of reaction \(2\) if the order of reaction is same for both.
- C The SI unit of rate constant of reaction \(1\) is s\(^{-1}\).
- D Thermal decomposition of HI on gold surface is an example of reaction \(2\).
Answer & Solution
Correct Answer
(B) The rate constant of reaction \(3\) is larger than the rate constant of reaction \(2\) if the order of reaction is same for both.
Step-by-step Solution
Detailed explanation
Analysis of the graph: The graph shows reactant concentration \([R]\) vs time \(t\) for three reactions starting from the same initial concentration. Curve 1 is a straight line with negative slope. For a zero-order reaction, the integrated rate law is \([R] = [R]_0 - kt\), which…
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