NEET Chemistry Chemical Kinetics Questions Solved

NEET - 2007

The following equilibrium constants are given:

N2 + 3H2           2NH3; K1N2 + O2           2NO; K2H2 + 12O2           H2O; K3
The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:

(a) K2K33K1

(b) K2K32K1

(c) K22K3K1

(d) K1K2K3

(a) The required equation of oxidation of NH3 by oxygen to give NO is:

4NH3 +5O2 800°CPt (gauze)4NO +6H2OFor this     K=NO4H2O6NH34O25For the equation I K1=NH32N2H23For the equation II K2=NO2N2H23For the equation III K3=H2OH2O212For getting the K we must do  K 12=NH34N22H26, K22=NO4N22O22K36=H2O6H26O262=3K=K22 ×K36K12 substituting the value we get,K=NO4H2O6NH34O25so the value of K in terms ofK1, K2 and K3 is                       K=K2K33K1

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