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.
only $$NO_3^ - $$
B.
both $$SO_4^{2 - }\,{\text{and}}\,NO_3^ - $$
C.
only $${F^ - }$$
D.
only $$SO_4^{2 - }$$
Answer :
only $${F^ - }$$
Solution :
Above 2 ppm concentration of $${F^ - }$$ in drinking water causes brown mottling of teeth.
Releted MCQ Question on Inorganic Chemistry >> P - Block Elements
Releted Question 1
The reddish brown coloured gas formed when nitric oxide is oxidised by air is