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Correct order of boiling point $(BP)$ is:

Match the items in Column-$I$ with the relevant item in Column-$II$.
Column-$I$ Column-$II$
$A$. Hydrogen peroxide is used as a $1$. zeolite
$B$. Used in Calgon method $2$. perhydrol
$C$. Permanent hardness of hard water is removed by $3$. sodium hexametaphosphate
$4$. propellant

Match the following columns:
Column-$I$ Column-$II$
$(i)$ Hydrogen peroxide $(a)$ Used as air purifier in submarines
$(ii)$ Calcium sulphate hemihydrate $(b)$ Used for water softening
$(iii)$ Potassium superoxide $(c)$ Antiseptic
$(iv)$ Calgon $(d)$ Plaster of Paris

Match the following columns:
Column-$I$ Column-$II$
$(i)$ Hydrogen peroxide $(a)$ Used as air purifier in submarines
$(ii)$ Calcium sulphate hemihydrate $(b)$ Used for water softening
$(iii)$ Potassium superoxide $(c)$ Antiseptic
$(iv)$ Calgon $(d)$ Plaster of Paris

$CuSO_4$ solution $+$ lime is called

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