दैनि रासायनारि पारामिटाराव लोंनाय दैखौ नाइट्रेट , फ्लराइद आरो आरसेनिकनि गोनां बिहोमा दङ ।
In the chemical composing of water the roles of nitrate , fluoride and arsenic are very important in the ascertainment of the suitability of the drinking water .