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(D) The process of demineralization or deionization of water uses organic ion-exchange resins. In this process,cation exchange resins remove all catio

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Free from all soluble mineral salts

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(D) The process of demineralization or deionization of water uses organic ion-exchange resins. In this process,cation exchange resins remove all cations like $Ca^{2+}$,$Mg^{2+}$,$Na^+$,etc.,and anion exchange resins remove all anions like $Cl^-$,$SO_4^{2-}$,$HCO_3^-$,etc. Therefore,the water obtained is free from all soluble mineral salts,which is often referred to as deionized or demineralized water.

Column-$1$ (Reaction)	Column-$2$ (Main product)
$A$. $SO_3 \xrightarrow{D_2O}$	$I$. $C_2D_2$
$B$. $CaC_2 \xrightarrow{D_2O \text{ (excess)}}$	$II$. $CD_4$
$C$. $Al_4C_3 \xrightarrow{D_2O \text{ (large excess)}}$	$III$. $D_2SO_3$
	$IV$. $C_2D_4$
	$V$. $D_2SO_4$

Water obtained by purification with organic ion exchange resins is:

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