CHXI14:ENVIRONMENTAL CHEMISTRY
318631
In the Nalgonda method, chemicals used for defluoridation of water in correct order are
1 \(\mathrm{CaO}+\mathrm{CaOCl}_{2}\)
2 \(\mathrm{CaOCl}_{2}+\mathrm{CaO}+\) Alum
3 \(\mathrm{CaO}+\mathrm{CaOCl}_{2}+\) Alum
4 Any of the above
Explanation:
Conceptual Questions