4.1 Rate of a Chemical Reaction
1. For the chemical reaction,
\[
N _{2(g)}+3 H _{2(g)} \rightleftharpoons 2 NH _{3(g)}
\]
the correct option is
(a) \( 3 \frac{d\left[ H _{2}\right]}{d t}=2 \frac{d\left[ NH _{3}\right]}{d t} \)
(b) \( -\frac{1}{3} \frac{d\left[ H _{2}\right]}{d t}=-\frac{1}{2} \frac{d\left[ NH _{3}\right]}{d t} \)
(c) \( -\frac{d\left[ N _{2}\right]}{d t}=2 \frac{d\left[ NH _{3}\right]}{d t} \)
(d) \( -\frac{d\left[ N _{2}\right]}{d t}=\frac{1}{2} \frac{d\left[ NH _{3}\right]}{d t} \)
