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AIIMS 2001
Exam
AIIMS
Year
2001
Subject
Chemistry
Chapter
Chemical Equilibrium

AIIMS 2001 · Chemistry · Chemical Equilibrium

In which of the following reaction K_p>K_c ?

In which of the following reaction Kp>KcK_p>K_c ?

Options

  1. APCl3+Cl2→PCl5\mathrm{PCl}_3+\mathrm{Cl}_2 \rightarrow \mathrm{PCl}_5
  2. BH2+\mathrm{H}_2+\mathrm{I}2→2HI_2 \rightarrow 2 \mathrm{HI}
  3. C2SO3→O2+2SO22 \mathrm{SO}_3 \rightarrow \mathrm{O}_2+2 \mathrm{SO}_2
  4. DN2+3H2→2NH3\mathrm{N}_2+3 \mathrm{H}_2 \rightarrow 2 \mathrm{NH}_3.

Correct answer

C. 2SO3→O2+2SO22 \mathrm{SO}_3 \rightarrow \mathrm{O}_2+2 \mathrm{SO}_2

Step-by-step solution

 \text{ } K_p=K_c(R T)^{\Delta n} Δn=\Delta n= change in number of moles If Δn=\Delta n= positive then KpK_p will be greater than KcK_c. PCl3+Cl2→PCl5,Δn=1−2=−1;Kp<KcH2+I2→2HI,Δn=0;Kp=Kc2SO3→O2+2SO2,Δn=1;Kp>Kc N2+3H2→2NH3;Δn=−2;Kp<Kc\begin{array}{ll} \mathrm{PCl}_3+\mathrm{Cl}_2 \rightarrow \mathrm{PCl}_5, & \Delta n=1-2=-1 ; K_p < K_c \\ \mathrm{H}_2+\mathrm{I}_2 \rightarrow 2 \mathrm{HI}, & \Delta n=0 ; \quad K_p=K_c \\ 2 \mathrm{SO}_3 \rightarrow \mathrm{O}_2+2 \mathrm{SO}_2, & \Delta n=1 ; \quad K_p>K_c \\ \mathrm{~N}_2+3 \mathrm{H}_2 \rightarrow 2 \mathrm{NH}_3 ; & \Delta n=-2 ; K_p < K_c \end{array}
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