JEE Main 2019 — Environmental Chemistry Question with Solution
From: JEE Main 2019 (Online) 9th January Morning Slot
Question
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 :
Choose an option
Show full solutionCorrect option: B
Correct answer
BMn
Step-by-step explanation
When Mn present in water with concentration 0.05 ppm or more than this then the water is unsuitable for drinking.
Here given concentration for Mn is 5.0, which is grater than 0.05 that is why it is Mn makes water unsuitable for drinking.
For other metal water is suitable for drinking when concentration for Fe = 0.2 ppm and for Cu = 3.0 ppm and for Zn = 5.0 ppm.
Here given concentration for Mn is 5.0, which is grater than 0.05 that is why it is Mn makes water unsuitable for drinking.
For other metal water is suitable for drinking when concentration for Fe = 0.2 ppm and for Cu = 3.0 ppm and for Zn = 5.0 ppm.
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This is a previous-year question from JEE Main 2019, covering the Environmental Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.