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3. Chemical kinetics — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry3. Chemical kinetics1 Mark
MCQ
Which of the following is correct
  • A
    $\frac{{{t_{3/4}}}}{{{t_{1/2}}}} = 3$ [first order reaction]
  • B
    $\frac{{{t_{7/8}}}}{{{t_{1/2}}}} = 3$ [second order reaction]
  • ✓
    $\frac{{{t_{7/8}}}}{{{t_{1/2}}}} = \frac{7}{4}$ [zero order reaction]
  • D
    $\frac{{{t_{15/16}}}}{{{t_{1/2}}}} = 15$ [first order reaction]
✓

Answer

Correct option: C.
$\frac{{{t_{7/8}}}}{{{t_{1/2}}}} = \frac{7}{4}$ [zero order reaction]
c
$x = kt$ for zero order $ \Rightarrow \frac{{{t_{7/8}}}}{{{t_{1/2}}}} = \frac{7}{4}$

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