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Question

In the following equilibrium taking place at 298 K in 5 L flask, moles of SO2 and SO3 are equal at equilibrium.
2SO2(g)+O2(g)2SO3(g)
KC=5
Thus number of moles of O2(g) at equilibrium are_________.

A
1
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B
2
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C
5
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D
2.5
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Solution

The correct option is B 2
Given
Kc=5
Volume of flask=5L
Temperature=298K
MolesofSO2=MolesofSO3=x
Solution
2SO2+O2=2SO3
Kc=[SO3]2[SO2]2[O2]
5=10/y
y=2
Moles of O2 is 2
The correct option is B


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