$3.$ Consider what happens when liquid SCl $2$ dissolves in CHCl $3.$

$($a$)$ What type of attractive forces must be overcome in the liquid CHCl $3?$

$($b$)$ What type of forces must be overcome in the liquid SCl $2?$

$($c$)$ What type of attractive forces are important when SCl $2$ dissolves in liquid CHCl $3?$

$4.($a$)$ Which of the ions Sr $2+,$ Rb $+,$ Mg $2+$ will have the lar gest heat of hydration? Which the smallest? $($b$)$ Of the two compounds CaO and MgO, which has the stronger intermolecular forces?

$($c$)$ Of the two compounds H $2$ O and CCl $4,$ which has the stronger intermolecular forces?