An alloy which does not contain copper is

White vitriol is .......

The metal that gives hydrogen gas upon treatment with both acid as well as base is

Which of the anhydrous salts,when it comes in contact with water,turns blue?

Match the following:

List-$I$ (Chemical)	List-$II$ (Use)
$A$. $KOH$	$I$. Coolant
$B$. $Na_{(l)}$	$II$. Antacid
$C$. $Li$	$III$. Electrochemical Cells
$D$. $Mg(OH)_2$	$IV$. Absorbent for $CO_2$

The correct answer is:

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals: $(i)$ Nitrates,$(ii)$ Carbonates,$(iii)$ Sulphates.