{:(,"Column A",,,"Column B"),(A.,"Efflorescent",(),a.,"Cobalt chloride"),(B.,"Deliquescent",(),b.,"Sodium chloride"),(C.,"Hygroscopic",(),c.,"Zinc chloride"),(D.,"Food additive",(),d.,"Mercuric nitrate"),(,,(),e.,"Washing soda"):}

{:(,"Column A",,,"Column B"),(A.,"Efflorescent",(),a.,"Cobalt chloride

1.	{:(,"Column A",,,"Column B"),(A.,"Efflorescent",(),a.,"Cobalt chloride"),(B.,"Deliquescent",(),b.,"Sodium chloride"),(C.,"Hygroscopic",(),c.,"Zinc chloride"),(D.,"Food additive",(),d.,"Mercuric nitrate"),(,,(),e.,"Washing soda"):}
Answer» SOLUTION :A `rarr` e `Na_(2)CO_(3)*10H_(2)O` loses nine WATER molecules on exposure to air and it is an example of efflorescent substance. B `rarr` c, d ZINC CHLORIDE and mercuric nitrate are examples of deliquescent substance. C `rarr` a Cobalt chloride is an example of hygroscopic substance. D `rarr` b Sodium chloride is used as food additive.