NEET Chemistry Chemical Kinetics Questions Solved


Consider the chemical reaction,

         N2(g) +3H2(g)2NH3(g)The rate of this reaction can be expressed in terms of time derivative of concentration of N2(g),H2(g) and NH3(g). Identify the correct relationship amongest the rate expressions:(a) Rate=-d[N2]/ dt=-13d[H2]/dt=12d[NH3]/dt(b) Rate=-d[N2]/ dt=-3d[H2]/dt=2d[NH3]/dt(c) Rate=d[N2]/ dt=13d[H2]/dt=12d[NH3]/dt(d) Rate=-d[N2]/ dt=-d[H2]/dt=d[NH3]/dt

(a)

For,N2+3H2=2NH3raye of reaction =-d[N2]dt=-13d[H2]dt=12d[NH3]dtwhere, -d[N2]dtis rate of consumption of N2(-ve sign)-d[H2]dtis rate of consumption of H2(-ve sign)+d[NH3]dtis rate of consumption of NH3(+ve sign)Individual rates become equal when each of these is divided by their respective stochiometric coefficient.

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