JEE Main 2021 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2021 (Online) 17th March Morning Shift
Question
15 mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr2O. The molarity of the Fe2+ solution is __________ 10-2 M. (Round off to the Nearest Integer).
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Show full solutionCorrect answer: 24
Correct answer
24
Step-by-step explanation
Valance Factor of = 6
Valance Factor of = 1
mili eq. of = mili eq. of Fe2+
6(0.03 20) = 1(M 15)
M = 6(0.03)4/3
M = 0.24 M
M = 24 102 M
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This is a previous-year question from JEE Main 2021, covering the Some Basic Concepts Of 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.