The equilibrium N2g+O2g2NOg established in a reaction vessel of 2.5 L capacity.

The amount of N2 and O2 taken at the start were respectively 2 moles and 4 moles. Half a mole of nitrogen has been used up at equilibrium. The molar concentration of nitric oxide is

  1. A

    0.2

  2. B

    0.4

  3. C

    0.6

  4. D

    0.1

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    Solution:

    N2g+O2g2NOg

    Initial : 2 4 0

    Conc. at equilibrium

            2-X   4-X  2X

    According to question on ½ mole ofN2 is used up at equilibrium,

    so x=12

    n0=2X=21/2=1

    Molar concentration =nV=12.5=1025=4.0 mol/lit

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