MCQ
$A$ is


- A

- ✓

- C

- D







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| Initial $[A_{(g)}]/mol \ dm^{-3}$ | Initial $[B_{(g)}]/mol \ dm^{-3}$ | Initial rate$/mol \ dm^{-3}S^{-1}$ |
| $3.0 \times 10^{-2}$ | $2.0 \times 10^{-2}$ | $1.89 \times 10^{-4}$ |
| $3.0 \times 10^{-2}$ | $4.0 \times 10^{-2}$ | $1.89 \times 10^{-4}$ |
| $6.0 \times 10^{-2}$ | $4.0 \times 10^{-2}$ | $7.56 \times 10^{-4}$ |