An ionic solid containing $ClO_4^-$ions

A covalent solid containing hydrogen bonded $H_2O$

An ionic solid containing $H^+$ions

An ionic solid containing $ClO_4^-$ions

30 volumes $H_2O_2$ means

$1\,cm^3$ of the solution liberates $30\,cm^3$ of $O_2$ at STP

$30\,cm^3$ of the solution contains 1g of $H_2O_2$

$1\,cm^3$ of the solution liberates $30\,cm^3$ of $O_2$ at STP

$30\,cm^3$ of the solution contains one mole of $H_2O_2$

In alkaline medium,$H_2O_2$ reacts with $Fe^{3+}$ and $Mn^{2+}$ respectively to give

$Fe^{2+}\text{ and } Mn^{4+}$

$Fe^{4+}\text{ and } Mn^{4+}$

$Fe^{2+}\text{ and } Mn^{2+}$

$Fe^{2+}\text{ and } Mn^{4+}$

$Fe^{4+}\text{ and } Mn^{2+}$

An ionic solid containing $ClO_4^-$ions

$1\,cm^3$ of the solution liberates $30\,cm^3$ of $O_2$ at STP

$Fe^{2+}\text{ and } Mn^{4+}$

10 mL of $H_{2} O_{2}$ solution is treated with Kl and titration of liberated $l_{2}$ , required 10 mL of 1 N hypo. Thus $H_{2} O_{2}$ is

In alkaline medium, $H_{2} O_{2}$ reacts with $Fe^{3+}$ and $Mn^{2+}$ respectively to give

In transforming 0.01 mole of PbS to $P b S O_{4}$ , the volume of '10 volume' $H_{2} O_{2}$ required will be

The hardness of water sample containing 0.002 mole of magnesium sulphate dissolved in a litre of water is expressed as :