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Question

From threactions: C(s)+2H2(g)→CH4(g)DH=–Xcal C(g)+4H(g)→CH4(g),DH=–X1Kcal CH4(g)→CH3(g)+H(g)DH=+Y(Kcal) Bond energof C–H bond is-

  1. fraction numerator X over denominator 4 end fraction Kcal.mol    
  2. YKcal.mol    
  3. fraction numerator X 1 over denominator 4 end fraction Kcal.mol    
  4. X1Kcal.mol    

The correct answer is: fraction numerator X 1 over denominator 4 end fraction Kcal.mol

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