With regard to standard of quality of drinking water as laid down by Indian Railway , the requirement (desirable) limit of total dissolved solids should not be more than---------- mg/l a)200 b) 300 c) 400 d) 500*

With regard to standard of quality of drinking water as laid down by Indian Railway , the  requirement (desirable) limit of total dissolved solids should not be more than---------- mg/l a)200
b) 300
c) 400
by

1 Answer

Answer :

d) 500*
by

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