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A mixture containing N2 and H2 in a mole...

A mixture containing `N_2` and `H_2` in a mole ratio 1 : 3 is allowed to attain equilibrium when 50% of the mixture has reacted. If P is the pressure at equilibrium, then the partial pressure of `NH_3` formed is

A

P/3

B

P/2

C

P/9

D

P/5

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The correct Answer is:
A
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