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For reaction, \( \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g) \rightleftharpoons \mathrm{PCl}_{5}(g) \), the value of \( K_{c} \) at \( 250^{\circ} \mathrm{C} \) is \( 26 \mathrm{~mol} \mathrm{litre}^{-1} \). The value of \( K_{p} \) at this temperature will be:
(A) \( 0.61 \mathrm{~atm}^{-1} \)
(B) \( 0.57 \mathrm{~atm}^{-1} \)
(C) \( 0.83 \mathrm{~atm}^{-1} \)
(D) \( 0.46 \mathrm{~atm}^{-1} \)
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