MCQ
The correct order as indicate in each option is
- ✓$CaF_2 > CaCl_2 > CaBr_2$ Melting point
- B$CH_3F > CH_3Cl > CH_3Br$ Dipole moment
- C$np_{\pi } - np\pi < ns-ns > ns-np$ Extent of overlapping
- D$H_2 > H_2^+ = H_2^-$ Stability
According to Fajans rule, the larger the size of the anion, greater is the covalent character of the ionic bond.
As covalent character increases, melting point decreases, thus order of melting point is:
$CaF _2\,> \,CaCl _2\,>\, CaBr _2$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.