Which pair will form the most stable ionic bond?

If the enthalpy of sublimation of $Li$ is $155 \ kJ \ mol^{-1}$, enthalpy of dissociation of $F_2$ is $150 \ kJ \ mol^{-1}$, ionization enthalpy of $Li$ is $520 \ kJ \ mol^{-1}$, electron gain enthalpy of $F$ is $-313 \ kJ \ mol^{-1}$, and standard enthalpy of formation of $LiF$ is $-594 \ kJ \ mol^{-1}$, then the magnitude of the lattice enthalpy of $LiF$ is . . . . . . $kJ \ mol^{-1}$ (nearest integer).

Which of the following statements is correct for $CsBr_3$?

Write the favourable factors for the formation of ionic bond.

The compound that has the highest ionic character associated with the $X-Cl$ bond is

The correct order of melting points of the following salts is $LiF$ $(I)$, $LiCl$ $(II)$, $LiI$ $(III)$.