WBJEE · Chemistry · Redox Reactions
Identify the correct statements(s) :
- A The oxidation number of Cr in \(\mathrm{CrO}_5\) is +6
- B \(\Delta \mathrm{H}\gt\Delta \mathrm{U}\) for the reaction \(\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2(\mathrm{~g})\), provided both gases behave ideally
- C pH of \(0.1(\mathrm{~N}) \mathrm{H}_2 \mathrm{SO}_4\) is less than that of \(0.1(\mathrm{~N}) \mathrm{HCl}\) at \(25^{\circ} \mathrm{C}\)
- D \(\left(\frac{R T}{F}\right)=0.0591\) volt at \(25^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(B) \(\Delta \mathrm{H}\gt\Delta \mathrm{U}\) for the reaction \(\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2(\mathrm{~g})\), provided both gases behave ideally
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \text { B: } \quad \mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2(\mathrm{~g}) \\ & \therefore \Delta \mathrm{n}_{\mathrm{g}}=2-1=1\end{aligned}\) and from \(\Delta H=\Delta U+\Delta n_g R T ; \Delta H\gt\Delta U\) C: For…
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