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

A water sample has ppm level concentration of following anions F^(-)=

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^(-)` Solution :ACCEPTABLE LEVEL of `F^-` is upto 1 ppm, `NO_3^-` is upto 50 ppm and `SO_4^(2-)` is upto 500 ppm `F^-` concentration in water sample is 10 ppm which is higher than the permissible level. THEREFORE, only `F^-` MAKES the water sample UNSUITABLE for drinking