The oxidation number of $$\mathrm{Cr}$$ in $$\mathrm{CrO}_5$$ is +6

$$\Delta \mathrm{H}>\Delta \mathrm{U}$$ for the reaction $$\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2$$ (g), provided both gases behave ideally

$$\mathrm{pH}$$ of $$0.1(\mathrm{~N}) \mathrm{H}_2 \mathrm{SO}_4$$ is less than that of $$0.1(\mathrm{~N}) \mathrm{HCl}$$ at $$25^{\circ} \mathrm{C}$$

$$\left(\frac{\mathrm{RT}}{\mathrm{F}}\right)=0.0591$$ volt at $$25^{\circ} \mathrm{C}$$

The oxidation number of Cr in CrO₅ is + 6.

$$\Delta$$H > $$\Delta$$U for the reaction N₂O₄(g) $$\to$$ 2NO₂(g) provided both gases behave ideally.

pH of 0.1 N H₂SO₄ is less than that of 0.1 N HCl at 25$$^\circ$$C.

$$\left( {{{RT} \over F}} \right)$$ = 0.0591 volt at 25$$^\circ$$C

as a catalyst

to make fused mixture conducting

to lower the melting temperature of the mixture

to decrease the rate of oxidation of carbon at anode