The equilibrium A(g) + 4B(g) <--------> AB ^₄ (g) is attained by mixing equal moles of A and B in a one litre vessel. Then at equilibrium:- (Kindly explain the answer also)


a) [A] = [B]
b) [A] > [B]
c) [A] < [B]
d) [AB₄] > [A]

Kindly answer sir/mam.

Dear Student,

Please find below the solution to the asked query:

Consider the equilibrium reaction.

$$\begin{gathered} \mathrm{A}\left(\mathrm{g}\right) + 4 \mathrm{B}\left(\mathrm{g}\right) \rightleftharpoons {\mathrm{AB}}_4\left(\mathrm{g}\right) \\ \mathrm{Initial} \mathrm{concentration} \mathrm{a} \mathrm{a} 0 \\ \mathrm{Equilibrium} \mathrm{concentration} \left(\mathrm{a}-\mathrm{x}\right) \left(\mathrm{a}-4\mathrm{x}\right) \mathrm{x} \end{gathered}$$

Thus, at equilibrium it is quite clear that, [A] > [B].

Hence, the correct answer is b)

Hope this information will clear your doubts.

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