A water sample has $p p m$ level concentration of following anions:
$F^{-} = 10, S O_{4}^{2 -} = 100, N O_{3}^{-} = 50$ The anion/anions that make/makes the water sample unsuitable for drinking is/are:

Both

S O_{4}^{2 -} = 500 p p m

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Only

F^{-}

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Only

S O_{4}^{2 -}

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Only

N O_{3}^{-}

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Solution

The correct option is B Only $F^{-}$
Permissible limit for $S O_{4}^{2 -} = 500 p p m$
Permissible limit for $N O_{3}^{-} = 50 p p m$
Permissible limit for $F^{-} = 1 p p m$

Suggest Corrections

Similar questions

F^{-} = 10; S O_{3}^{2 -} = 100; N O_{3}^{-} = 50

p p m

F^{-} = 10, S O_{4}^{2 -} = 100, N O_{3}^{-} = 50

F^{-} = 10; S O_{3}^{2 -} = 100; N O_{3}^{-} = 50

F e = 0.2; M n = 5.0; C u = 3.0; Z n = 5.0

M g C l_{2}

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