Match the compounds listed in colomn-I with the related uses/particulars listed in column-II. {:("ColumnI","ColumnII"),((A)"Calcium hypochlorite",(p)"Used as air purifier in submarine"),((B)"Calcium suphate hemi hydrate",(q)"Used for 'softening' water"),((C )"Potassium super oxide",(r)"A constituent of bleaching powder" ),((D)"Calcium oxide",(s)"Plaster of Paris"),(,(t)"Used in preparation of sodium hydroxide."):}

Match the compounds listed in colomn-I with the related uses/particula

1.	Match the compounds listed in colomn-I with the related uses/particulars listed in column-II. {:("ColumnI","ColumnII"),((A)"Calcium hypochlorite",(p)"Used as air purifier in submarine"),((B)"Calcium suphate hemi hydrate",(q)"Used for 'softening' water"),((C )"Potassium super oxide",(r)"A constituent of bleaching powder" ),((D)"Calcium oxide",(s)"Plaster of Paris"),(,(t)"Used in preparation of sodium hydroxide."):}
Answer» Solution :(A)`3Ca(OH)_2+2Cl_2 to Ca(OC l)_2. Ca(OH)_2. CaCl_2. 2H_2O`(bleaching powder) `Ca(O CL)_2` is constituent of bleaching powder. (B)`CaSO_4 . 1/2H_2O` is CALLED as Plaster of Paris. (C )`KO_2` absorbs `CO_2` and gives `O_2` gas according to the FOLLOWING reactions, so used as air purifier in submarine. `2KO_2 + CO_2 to K_2CO_3+3/2O_2, 2KO_2 + 2H_2O to 2KOH + H_2O_2 +O_2` (D)Calcium oxide i.e. quick lime is used for the removal of temporary hardness of water. `CaO+H_2O to Ca(OH)_2 , Ca(OH)_2 + Ca(HCO_3)_2 to 2CaCO_3 darr + 2H_2O` `Ca(OH)_2+Na_2CO_3 to CaCO_3 darr + 2NAOH`(causticising PROCESS).