(C) The reaction is $A_{(g)} \rightleftharpoons 2B_{(g)} + C_{(g)}$.Let the initial pressure of $A$ be $P_0 = 450 \ mm \ Hg$.Let the pressure of $A$ t

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(C) The reaction is $A_{(g)} \rightleftharpoons 2B_{(g)} + C_{(g)}$.Let the initial pressure of $A$ be $P_0 = 450 \ mm \ Hg$.Let the pressure of $A$ that decomposes at time $t$ be $p$.At $t=0$: $P_A = 450, P_B = 0, P_C = 0$. Total pressure $P_i = 450 \ mm \ Hg$.At time $t$: $P_A = 450 - p, P_B = 2p, P_C = p$.Total pressure $P_t = (450 - p) + 2p + p = 450 + 2p$.Given $P_t = 720 \ mm \ Hg$,so $450 + 2p = 720$.$2p = 270 \implies p = 135 \ mm \ Hg$.The fraction of $A$ decomposed is $\alpha = \frac{p}{P_0} = \frac{135}{450} = 0.3$.Given $\alpha = x \times 10^{-1} = 0.3$,therefore $x = 3$.

Class 11 Chemistry 6-1.Equilibrium (Chemical Equilibrium)Degree of dissociation and Vapour density

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$A_{(g)} \rightleftharpoons 2B_{(g)} + C_{(g)}$
For the given reaction,if the initial pressure is $450 \ mm \ Hg$ and the total pressure at time $t$ is $720 \ mm \ Hg$ at a constant temperature $T$ and constant volume $V$. The fraction of $A_{(g)}$ decomposed under these conditions is $x \times 10^{-1}$. The value of $x$ is $......$. (nearest integer)

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$2$
B
$4$
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$3$
D
$5$

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Degree of dissociation and Vapour density

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For the reaction,$N_2 + O_2 \rightleftharpoons 2NO$,the equilibrium constant is $K_c = 2$. If both reactants have the same initial moles,what is the degree of dissociation of $N_2$ and $O_2$?

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