Enthalpy of formation of NH₃ is −X kJ and ΔH(H−H), ΔH(N−H) are respectively Y kJ mol⁻¹ and Z kJ mol⁻¹. The value of ΔH(N≡N) is
- AY − 6Z + X/3
- B−3Y + 6Z − 2X
- C3Y + 6Z + X
- DY + 6X + Z
✓ Correct answer: B
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