22. Nitrogen fixation is a process of A.Assimilation of nitrate B.Utilisation of nitrogen gas C.Conversion of organic nitrogen to proteins D.Conversion of molecular nitrogen to ammonia
Answer: Option C Solution: Alum is double sulphates having the composition M2SO4. M2(SO4)3.24H2O. Where M stands for monovalent basic radicals. Alums have Germicide properties and thus used in purification of water.
