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Consider the reactions given below. On thebasis of these reactions find out which of the algebric relations given in options (A) to (D) is correct?
\( \mathrm{P} \)
(a) \( \mathrm{C}(\mathrm{g})+4 \mathrm{H} \) (g) \( \longrightarrow \mathrm{CH}_{4} \) (g); \( \quad \Delta_{\mathrm{r}} \mathrm{H}=\mathrm{x} \mathrm{kJ} \mathrm{mol}^{-1} \)
(b) C (graphite,s) \( +2 \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow \mathrm{CH}_{4}(\mathrm{~g}) ; \quad \Delta_{\mathrm{r}} \mathrm{H}=\mathrm{y} \mathrm{kJ} \mathrm{mol}^{-1} \)
W
(A) \( x=y \)
(B) \( x=2 y \)
(C) \( xy \)
(D) \( xy \)
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