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STD 12 - 3. Chemical kinetics — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 3. Chemical kinetics4 Marks
MCQ
Which one of the following formula represents a first order reaction
  • A
    $K = \frac{x}{t}$
  • B
    $K = \frac{1}{{2t}}\left[ {\frac{1}{{{{(a - x)}^2}}} - \frac{1}{{{a^2}}}} \right]$
  • ✓
    $K = \frac{{2.303}}{t}{\log _{10}}\frac{a}{{(a - x)}}$
  • D
    $K = \frac{1}{t}\,\frac{x}{{a(a - x)}}$
✓

Answer

Correct option: C.
$K = \frac{{2.303}}{t}{\log _{10}}\frac{a}{{(a - x)}}$
c
(c) For $1^{st}$ order reaction

$K = \frac{{2.303}}{t}{\log _{10}}\frac{a}{{(a - x)}}$

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