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[" Consider the reactions "],[qquad [C(s...

[" Consider the reactions "],[qquad [C(s)+2H_(2)(g)rarr CH_(4)(g),Delta H=-x" kcal "],[C(g)+4H(g)rarr CH_(4)(g),Delta H=-x_(1)kcal],[CH_(4)(g)rarr CH_(3)(g)+H(g),Delta H=+y" kcal "],[" The bond energy of "C-H" bond is "],[" (a) "y" kcal "mol^(-1)," (b) "x_(1)" kcal mol "^(-1)" [JIPMER 1"],[" (c) "x/4kcalmol^(-1)," (d) "x_(1)/4" kcal mol "^(-1)]]

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