The correct sequence of bond enthalpy of ‘C – X’ bond is:

Explanation:-

Bond Enthalpy:

• Bond enthalpy, sometimes referred to as bond energy, is a number that sheds light on the potency and, consequently, the stability of a chemical bond.
• The total energy needed to break 1 mole of a chemical bond is known as the bond enthalpy of that chemical bond.
• The bond strength decreases with increasing atom size, increasing bond length, and decreasing bond dissociation enthalpy.
• Bond dissociation enthalpy increases as bond multiplicity decrease.
• The bond dissociation enthalpy decreases as the number of lone pair electrons on the bound atom increases along with the repulsion between the atoms.
• The number of bonds between two atoms in a molecule or ion's Lewis representation is referred to as the bond order.
• The bond is more stable, or has a higher bond enthalpy, as the bond order increases.
• The bond length is shorter the higher the bond order.

Concept:

∴ Bond enthalpy from CH3 – F to CH3 – I decreases