Question

# The equilibrium constant for the reaction $$CO(g) +H_2O(g) \rightleftharpoons CO_2(g)+H_2(g)$$ is 5. How many moles of $$CO_2$$ must be added to 1 litre container already containing 3 moles each of CO and $$H_2O$$ to make 2 M equilibrium concentration of CO?

A
15
B
19
C
5
D
20

Solution

## The correct option is A 19$$CO$$$$+H_1O$$$$\rightleftharpoons$$$$CO_2$$$$+H_2$$initial conc.$$3$$$$3$$$$x$$$$0$$At eqm$$2$$$$2$$$$(x+1)$$$$1$$$$5=\dfrac{(x+1)}{4}=20=x+1$$$$\Rightarrow x=19$$Chemistry

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