NEET Chemistry Chemical Kinetics Questions Solved

NEET - 2006

Consider the reaction

N2(g) +3H2(g) 2NH3(g)

The equality relationship between d[NH3]/dt and -d[H2]/dt is:

(a) d[NH3]/dt = -1/3.d[H2]/dt

(b) +d[NH3]/dt = -2/3.d[H2]/dt

(c) +d[NH3]/dt = -3/2.d[H2]/dt

(d) d[NH3]/dt = -d[H2]/dt

For the reaction

 N2(g) + 3H2(g) 2NH3(g)

The rate of reaction w.r.t N2 = -d[N2]/dt

The rate of reaction w.r.t H2 = -1/3.d[H2]/dt

The rate of reaction w.r.t NH3 = =1/2.d[NH3]/dt

Hence, at a fixed time

           -d[N2]/dt = -1/3. d[H2]/dt

                          = +1/2.d[NH3]/dt

or          =d[NH3]/dt = -2/3.d[H2]/dt

or                            = -2d[N2]/dt

Difficulty Level:

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