Verified Solution • 2025–26 Session moderate

QAIPMT-2007-Ch-2330: NEET 2007 Chemistry - Class 12 AIPMT-2007-Ch-2330 Solution: In a first-order reaction \(A B\), if k is rate constant and…

In a first-order reaction A→BA\rightarrow B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is

Multiple Choice Options

  • A log⁡2k\frac{\log 2}{k}
  • B log⁡2k0.5\frac{\log 2}{k\sqrt{0.5}}
  • C ln⁡2k\frac{\ln 2}{k}
  • D 0.6930.5k\frac{0.693}{0.5k}

Step-by-Step Verified Solution

For first order reaction k = 2.303 t log _ a a _ x at t 1 / 2 , x = a 2 t 1 / 2 = 2.303 k log _ a a _ a 2 = ln _ 2 k

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