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JEE Main 2020 — Environmental Chemistry Question with Solution

JEE Main 2020 (09 Jan Shift 2)

Question

10.30mg of O2 is dissolved into a liter of sea water of density 1.03g/mL . The concentration of O2 in ppm is _____________.

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Show full solutionCorrect answer: 10
Correct answer
10

Step-by-step explanation

Formula of ppm is-

ppm=weight of soluteweight of solution×106

ppm=10.3×10-31030×106 =10

PPM is a concentration term and its full form is "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water.

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About this question

This is a previous-year question from JEE Main 2020, 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.