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Q. |
The permissible level of HCN in drinking water is |
A. | More than 50 mg/litre |
B. | Around 1 mg/litre |
C. | Less than 0.01 mg/litre |
D. | Between 10 to 20 mg/litre |
E. | Around 5 mg/litre |
Answer» C. Less than 0.01 mg/litre |
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