The bond energies C − C, C = C, H − H and C − H linkages are 350, 600, 400 and 410 kJ/mol respectively. The heat of hydrogenation of ethylene is
- A−170 kJ mol⁻¹
- B−260 kJ mol⁻¹
- C−400 kJ mol⁻¹
- D−450 kJ mol⁻¹
✓ Correct answer: A
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