MCQ

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For the elementary reaction, $2 SO _{2 (g)}+ O _{2(g)} \rightarrow 2 SO _{3(g)}$, identify the correct relation among the following.

• A
  $-\frac{d\left[\mathrm{SO}_{2(g)}\right]}{d t}=-\frac{d\left[\mathrm{O}_{2(g)}\right]}{d t}$
  
• B
  $+\frac{1}{2} \frac{d\left[\mathrm{SO}_{3(g)}\right]}{d t}=+\frac{d\left[\mathrm{SO}_{2(g)}\right]}{d t}$
• C
  $+\frac{d\left[ SO _{\left.3_{(p)}\right]}\right.}{d t}=-2 \frac{\left.d O _{2_{(p)}}\right]}{d t}$
• D
  $+\frac{d\left[\mathrm{SO}_{2(g)}\right]}{d t}=-\frac{d\left[\mathrm{O}_{2(g)}\right]}{d t}$