JEE Main 2022ChemistrySolutionsMediumNumerical

JEE Main 2022 — Solutions Question with Solution

JEE Main 2022 (29 Jul Shift 1)

Question

If O2 gas is bubbled through water at 303 K, the number of millimoles of O2 gas that dissolve in 1 litre of water is____(Nearest integer) (Given : Henry's Law constant for O2 at 303 K is 46.82k bar and partial pressure of O2=0.920 bar)
(Assume solubility of O2 in water is too small, nearly negligible)

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Correct answer
1

Step-by-step explanation

p=KH×x

0.920=46.82×103 bar ×mol of O2mol of H2O

0.920=46.82×103×mol of O2100018

0.920=46.82×18×nO2

0.92046.82×18=nO2

⇒1.09×10-3=n02

⇒m mol of O2=1 millimole

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About this question

This is a previous-year question from JEE Main 2022, covering the Solutions 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.