Which of the following sulphates has the highest solubility in water?

Which of the following statements is false?

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$a$. $Ca(OCl)_2$	$i$. Antacid
$b$. $CaSO_4 \cdot \frac{1}{2} H_2O$	$ii$. Cement
$c$. $CaO$	$iii$. Bleach
$d$. $CaCO_3$	$iv$. Plaster of Paris

Choose the most appropriate answer from the options given below:

Assertion $(A):- MgSO_{4}$ is readily soluble in water.
Reason $(R):-$ The greater hydration enthalpy of $Mg^{2+}$ ions overcomes its lattice enthalpy.

State True or False:
$(1)$ $90 \ g \ Na$ and $170 \ g \ K$ are present in a person with $70 \ kg$ of body weight.
$(2)$ Ionization enthalpy of alkaline earth metals increases on moving top to bottom.
$(3)$ In vapour phase,$BeCl_2$ possesses a polymer-like arrangement.
$(4)$ $CaCO_3$ is used in the preparation of mortar.

Which of the following sets represents the alkaline earth metals?