Question

Maximum prescribed limit of $Al$ in drinking water is $0.x\text{ppm}$. The value of $x$ is:

Answer 1

Maximum prescribed limit of $Al$ in drinking water is $0.2\text{ppm}$. There are some other metals such as iron, copper zinc etc. which have permissible concentration of $0.2\text{ppm},3\text{ppm}$ and $5\text{ppm}$ respectively.