Q.

In the reaction X(g)+Y(g)⇌2Z(g) , in a closed container of 5 litre volume initially 1 mole of each  X(g) and Y(g) were taken. If the equilibrium constant at same temperature found to be 4, the equilibrium concentration of  Z  (inmole.litre -1 )  is ____?

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answer is 0.2 MOLE .

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Detailed Solution

Initially          X+  Y⇌2Z1 mole  1mole 0  At equilibrium  1-n 1-n          2nEquilibrium constant =[Z]2[X][Y]4=(2n/5)21-n51-n52=2n1-nn=0.5 moles. n=0.5 moles.  Equilibrium concentration of Z=2×0.5 moles 5 litre =0.2M
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