The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb,40 ppb,100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of

The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm respectively. The water is unsuitable for drinking due to high concentration of-

The concentration of iron, lead ,nitrate, and fluoride in a water sample from an underground lake was found to be 0.18 ppm, 35 ppb, 80 ppm and 1000 ppb, respectively. This water is unsuitable for drinking due to high concentration of

The concentration of iron, lead ,nitrate, and fluoride in a water sample from an underground lake was found to be 0.18 ppm, 35 ppb, 80 ppm and 1000 ppb, respectively. This water is unsuitable for drinking due to high concentration of

The concentration of nitrate ion in drinking water if exceeds 500 ppm, it results in:

A water sample has ppm level concentration of the following metals : Fe=0.2,Mn=5.0,Cu=3.0,Zn=5.0. The metal that makes the water sample unsuitable for drinking is :

A water sample has ppm level concentration of the following metals : Fe=0.2,Mn=5.0,Cu=3.0,Zn=5.0. The metal that makes the water sample unsuitable for drinking is :

A water sample has ppm level concentration of the following metals : Fe=0.2,Mn=5.0,Cu=3.0,Zn=5.0. The metal that makes the water sample unsuitable for drinking is :