<prompt> Nalgonda technique for defluoridation of water consists of adding in sequence?Lime SodaSoda AlumAlum SodaLime Alum  <response>: NALGONDA TECHNIQUE:- Developed by National environment engineering research institute NEERI, Nagpur for Defluoridation of water. It involves addition of Lime, Alum, and Bleaching powder Mnemonic: LAB followed by Flocculation, Sedimentation and Filtration. In Nalgonda technique, Aluminum is major de-fluoridating agent. 