Which of the following order$(s)$ is/are correct?
$(A)$ Thermal stability: $BeSO_4 < MgSO_4 < CaSO_4 < SrSO_4$
$(B)$ Melting point: $NaCl > KCl > RbCl > CsCl$
$(C)$ Solubility: $LiOH < NaOH$
$(D)$ Lattice energy: $KF > KCl > KBr > KI$

What is the chemical formula for green vitriol?

Which of the following orders are correct?
$(I)$ Thermal stability: $BeSO_4 < MgSO_4 < CaSO_4 < SrSO_4$
$(II)$ Basic nature: $ZnO > BeO > MgO > CaO$
$(III)$ Solubility in water: $LiOH > NaOH > KOH > RbOH$
$(IV)$ Melting point: $NaCl > KCl > RbCl > CsCl > LiCl$

Select the incorrect order for the given properties:
$(a)$ $A_2B < AB < A_2B_3 = \text{Lattice Energy (L.E.)}$ (Charge of $B = -2$)
$(b)$ $Na_2CO_3 < K_2CO_3 < Rb_2CO_3 < Cs_2CO_3 = \text{Thermal stability}$
$(c)$ $MgF_2 < CaF_2 < SrF_2 < BaF_2 < BeF_2 = \text{Solubility}$
$(d)$ $LiOH < NaOH < KOH < RbOH < CsOH = \text{Solubility and stability}$

Compare the alkali metals and alkaline earth metals with respect to $(i)$ ionization enthalpy,$(ii)$ basicity of oxides,and $(iii)$ solubility of hydroxides.

Match the average fundamental compounds with their proper percentage present in Portland cement.

Compound	Percentage proportion
$1. CaO$	$d. 50-60\%$
$2. Al_2O_3$	$a. 5-10\%$
$3. SO_3$	$b. 1-3\%$