General Science » Exercise – 1
37. Permanent hardness of water can be removed by adding
(a) chlorine
(b) washing soda
(c) potassium permanganate
(d) bleaching powder
| Subject Name : General Science |
| Exam Name : UPSC, SSC, KVS, NVS, IBPS, RBI, SBI, RRB |
| Posts Name : Technical Assistant, Junior Scientist, Post Graduate Teacher, College Lecturer |
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