1.

A water sample has ppm level concentration of following anions F^(-)=10 , SO_(4)^(2-)=100 , NO_(3)^(-) =50 the anion/anions that make/makes the water sample unsuitable for drinking is/are

Answer»

only `F^(-)`
only `SO_(4)^(2-)`
only `NO_(3)^(-)`
both `SO_(4)^(2-)` and `NO_(3)^(-)`

ANSWER :A


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