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JEE Main 20199 JanuaryMorning Shift
Exam
JEE Main
Year
2019
Date
9 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Environmental Chemistry

JEE Main 2019 · 9 January · Morning Shift · Chemistry · Environmental Chemistry

A water sample has ppm level concentration of the following metals:...

A water sample has ppm level concentration of the following metals:

Fe=0.2;Mn=5.0;Cu=3.0;Zn=5.0Fe = 0 .2 ; Mn = 5 .0 ; Cu = 3 .0 ; Zn = 5 .0 .

The metal that makes the water sample unsuitable for drinking is

Options

  1. AZnZn
  2. BFeFe
  3. CMnMn
  4. DCuCu

Correct answer

C. MnMn

Step-by-step solution

The concentration of the ions for drinking water are,

Fe≤0.2ppmFe \le 0 .2 ppm

Mn≤0.05ppmMn \le 0 .05 ppm

Cu≤3.0ppmCu \le 3 .0 ppm

Zn≤5.0ppmZn \le 5 .0 ppm

Here, MnMn concentration is greater than the allowed limit. So, it makes the water sample unsuitable for drinking.
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