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6.1. Equilibrium - 1 (chemical Equilibrium) — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry6.1. Equilibrium - 1 (chemical Equilibrium)1 Mark
MCQ
Total number of moles for the reaction $2HI\,\,$ $\rightleftharpoons$ $ {H_2} + {I_2}.$ if $\alpha $ is degree of dissociation is
  • A
    $1$
  • B
    $2 - \alpha $
  • ✓
    $2$
  • D
    $1 - \alpha $
✓

Answer

Correct option: C.
$2$
(c) $\begin{array}{*{20}{c}}{}\\{{\rm{Initial }}}\end{array}\mathop {2HI}\limits_{\,\,{\rm{2}}}  \rightleftharpoons  \mathop {{H_2}}\limits_0 + \mathop {{I_2}}\limits_0 $ At equilibrium $2 - \alpha $ $\frac{\alpha }{2}$ $\frac{\alpha }{2}$ $ = 2 - \alpha + \frac{\alpha }{2} + \frac{\alpha }{2} = 2$.

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