Identify the correct statement(s): | vedclass

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(A, B) Statement $(a)$ is correct: In $CrO_{5}$ (butterfly structure), the oxidation number of $Cr$ is $+6$.Statement $(b)$ is correct: For the reacti

Vedclass · Accepted Answer

$\Delta H > \Delta U$ for the reaction $N_{2}O_{4(g)} \rightarrow 2NO_{2(g)}$ provided both gases behave ideally.

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(A, B) Statement $(a)$ is correct: In $CrO_{5}$ (butterfly structure), the oxidation number of $Cr$ is $+6$.Statement $(b)$ is correct: For the reaction $N_{2}O_{4(g)} \rightarrow 2NO_{2(g)}$, $\Delta n_{g} = 2 - 1 = 1$. Since $\Delta H = \Delta U + \Delta n_{g}RT$, and $\Delta n_{g} > 0$, we have $\Delta H > \Delta U$.Statement $(c)$ is incorrect: For $0.1 \ N \ H_{2}SO_{4}$, $[H^{+}] = 0.1 \ M$, so $pH = -\log(0.1) = 1$. For $0.1 \ N \ HCl$, $[H^{+}] = 0.1 \ M$, so $pH = -\log(0.1) = 1$. Thus, $pH$ values are equal.Statement $(d)$ is incorrect: At $25^{\circ} C$, $\frac{RT}{F} \approx 0.0257 \ V$. The value $0.0591 \ V$ corresponds to $\frac{2.303RT}{F}$.Therefore, the correct statements are $(a)$ and $(b)$.

Identify the correct statement$(s)$:

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