Verified Solution • 2025–26 Session moderate

QAIPMT-2005-Ch-2494: NEET 2005 Chemistry - Class 12 AIPMT-2005-Ch-2494 Solution: For a first order reaction \(A B\) the reaction rate at…

For a first order reaction A→BA\rightarrow B the reaction rate at reactant concentration of 0.01 M is found to be 2.0×10−5 mol L−1 s−12.0\times10^{-5}\ \text{mol L}^{-1}\ \text{s}^{-1}. The half-life period of the reaction is

Multiple Choice Options

  • A 30 s
  • B 220 s
  • C 300 s
  • D 347 s

Step-by-Step Verified Solution

Given [A] = 0.01 M Rate = 2.0 _ 10 �5 mol L �1 S �1 For a first order reaction Rate = k[A] k = 2 _ 10 _ 5 0.01 = 2 _ 10 _ 3 _ t 1 / 2 = 0.693 2 _ 10 _ 3 = 347 sec

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