ChemistryNEET 2019Rate law, order and molecularity

Chemical Kinetics

For the chemical reaction $N_{2} (g) + 3 H_{2} (g) ⇌ 2N H_{3} (g)$ , the correct expression relating the rates of disappearance/appearance of each species is:

A. $\frac{1}{3} \frac{d [ H _{2} ]}{d t} = \frac{1}{2} \frac{d [ N H _{3} ]}{d t}$
B. $\frac{d [ N _{2} ]}{d t} = 2 \frac{d [ N H _{3} ]}{d t}$
C. $- \frac{d [ N _{2} ]}{d t} = \frac{1}{2} \frac{d [ N H _{3} ]}{d t}$ ✓
D. $3 \frac{d [ H _{2} ]}{d t} = 2 \frac{d [ N H _{3} ]}{d t}$

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

Chemical Kinetics

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