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»

Both `SO_4^(2-)` and `NO_3^(-)`
Only `F^-`
Only `SO_4^(2-)`
Only `NO_3^-`

Solution :Acceptable level
`F^-` upto 1 PPM
`NO_3^-` upto 50 PPM
`SO_4^(2-)` upto 500 PPM


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