Water Supply Engineering - Water Supply Engineering
Water Supply Engineering (333) Add new question
Question
Q: Pick up the correct statement from the following :
Option | Answer | Is Correct |
---|---|---|
1 | Excess quantities of iron and manganese in water, cause discolouration of clothes | |
2 | Lead and barium salts have toxic effect | |
3 | Higher copper content affects the lungs | |
4 | All the above. |
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