For an elementary chemical \( \mathrm{A}_{2} \underset{\stackrel{\m...
For an elementary chemical \( \mathrm{A}_{2} \underset{\stackrel{\mathrm{k}_{1}}{\rightleftharpoons}}{\stackrel{\mathrm{k}_{-1}}{\rightleftharpoons}} 2 \mathrm{~A} \), the
\( \mathrm{P} \) expression for \( \frac{\mathrm{d}[\mathrm{A}]}{\mathrm{dt}} \) is
[JEE Main-2019(January)]
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(1) \( \mathrm{k}_{1}\left[\mathrm{~A}_{2}\right]-\mathrm{k}_{-1}[\mathrm{~A}]^{2} \)
(2) \( 2 \mathrm{k}_{1}\left[\mathrm{~A}_{2}\right]-\mathrm{k}_{-1}[\mathrm{~A}]^{2} \)
(3) \( \mathrm{k}_{1}\left[\mathrm{~A}_{2}\right]+\mathrm{k}_{-1}[\mathrm{~A}]^{2} \)
(4) \( 2 \mathrm{k}_{1}\left[\mathrm{~A}_{2}\right]-2 \mathrm{k}_{-1}[\mathrm{~A}]^{2} \)
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