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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
In which of the following equilibria, $\mathrm{K}_p$ and $\mathrm{K}_{\mathrm{c}}$ are $NOT$ equal?
  • A
    $\mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{HI}_{(\mathrm{g})}$
  • B
     $\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$
  • C
    $\quad 2 \mathrm{BrCl}_{(\mathrm{g})} \rightleftharpoons \mathrm{Br}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$
  • ✓
    $\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$
✓

Answer

Correct option: D.
$\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$
d
$ \mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}(\mathrm{RT})^{\Delta \mathrm{n}_g} $

$ \text { for } \mathrm{K}_{\mathrm{p}} \neq \mathrm{K}_{\mathrm{c}} $

$ \qquad \mathrm{n}_{\mathrm{g}} \neq 0 $

$ \Delta \mathrm{n}_{\mathrm{g}}=\mathrm{n}_{\mathrm{p}}-\mathrm{n}_{\mathrm{f}}$

(1) $\Delta \mathrm{n}_g=2-1=1$

(2) $\Delta \mathrm{n}_{\mathrm{g}}=2-2=0$

(3) $\Delta \mathrm{n}_9=2-2=0$

(4) $\Delta \mathrm{n}_{\mathrm{g}}=2-2=0$

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