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2 mols of SO(2) gas and 1 mol of O(2) ga...

2 mols of `SO_(2)` gas and 1 mol of `O_(2)` gas are placed in a sealed vessel and heated. The reaction proceeds at constant temperature and when equilibrium is reached, 80%^ of the `SO_(2)` had changed into `SO_(3)`. If the initial pressure in the vessel has 30 bar, the equilibrium pressure is

A

22 bar

B

20 bar

C

18 bar

D

16 bar

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The correct Answer is:
A
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