JEE Main 2017 · 2 Apr · Shift 1 · Chemistry Q44

ChemistrySingle correct+4 / -1Question 44 of 90

A water sample has ppm level concentration of following anions

$\ce{F-}=10$ ; $\ce{SO4^2-}=100$ ; $\ce{NO3-}=50$

The anion/anions that make/makes the water sample unsuitable for drinking is/are :

only

\ce{F-}

only

\ce{SO4^2-}

only

\ce{NO3-}

both

\ce{SO4^2-}

and

\ce{NO3-}

Answer and worked solution

Official answer: A

Drinking-water limits are about 1.5 ppm $\ce{F-}$ , 500 ppm $\ce{SO4^2-}$ and 50 ppm $\ce{NO3-}$ . Only fluoride, at 10 ppm, is over its limit.

JEE Main 2017 · 2 Apr · Shift 1, Chemistry question 44