The ore which is purified by leaching process is

$$ \begin{array}{r} \mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{CO}_2} 3 X+\mathrm{PH}_3 \uparrow \\ X \xrightarrow{\mathrm{HCl}(\mathrm{aq})} Y+\mathrm{NaCl} \end{array} $$

The incorrect statement about $Y$ is

The ratio of lone pair of electrons to bond pair of electrons in ozone molecule is

Consider the following statements about the oxides of halogens.

A. At room temperature, $\mathrm{OF}_2$ is thermally stable.

B. Order of stability of oxides of halogens is

$$ \mathrm{I}>\mathrm{Br}>\mathrm{Cl} . $$

C. $\mathrm{I}_2 \mathrm{O}_5$ is used in the estimation of CO .

D. $\mathrm{ClO}_2$ is used as a bleaching agent.

The correct statements are,