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 :

  • Option 1)

    Only F^{-}

  • Option 2)

    Only SO_{4}^{2}^{-}

  • Option 3)

    Only NO_{3}^{-}

  • Option 4)

    Both SO_{4}^{2}^{-} and NO_{3}^{-}

 

Answers (1)

As we learnt in

Mathematical Expression for Osmotic Pressure -

\pi =CRT
 

- wherein

\pi = Representation of osmotic pressure.

C =constant\: in \: moles

R =Gas \: constant= 0.0821\frac{atm.lit}{mol.k}

T=Temp. \: in\: kelvin

 

F- above 2PM concentration of  Fin drinking water cause brown melting of molting of teeth.

Correct option is 1.

 


Option 1)

Only F^{-}

The is the correct option.

Option 2)

Only SO_{4}^{2}^{-}

This is an incorrect option.

Option 3)

Only NO_{3}^{-}

This is an incorrect option.

Option 4)

Both SO_{4}^{2}^{-} and NO_{3}^{-}

This is an incorrect option.

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