Bond Enthalpy and Bond Order — MCQ Practice

Given the average bond enthalpies: C-H = 413 kJ/mol, O=O = 498 kJ/mol, C=O = 799 kJ/mol, O-H = 463 kJ/mol. Calculate the enthalpy change ($\Delta H$) for the combustion of methane: $\text{CH}_4(g) + 2\text{O}_2(g) \to \text{CO}_2(g) + 2\text{H}_2\text{O}(g)$.

Which of the following species has the highest bond order?

Which of the following statements about bond parameters is INCORRECT?

Arrange the following species in increasing order of bond enthalpy: $\text{N}_2$, $\text{N}_2^+$, $\text{N}_2^-$.

Which of the following diatomic molecules is paramagnetic and has a bond order of 2?

Which of the following species has the shortest bond length?

Which of the following factors does NOT significantly affect bond enthalpy?