well, the electronegativity of C and H no big difference compared to C and Cl.Cl is more elctronegativity and has more electron clouds at Cl causing the unequal distribution of electrons,and having this distortion making it less stable to heat and so C-Cl bond is the weakest.C-H bonds has less distortion due to almost symmetrical electron cloud.yes, chemical inertness due to C-F bond because the bond length is short and more overlapping of orbitals and need higer bond energy to break it. the higher the bond energy,the more difficult it undergoes reaction. raunaqbhatia theory is absolutely wrong, where u get that from?
