JEE Main 2007 — Solutions Question with Solution
From: AIEEE 2007
Question
A 5.25 % solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g mol−1) in
the same solvent. If the densities of both the solutions are assumed to be equal to 1.0 g cm−3, molar mass of the substance will be
Choose an option
Show full solutionCorrect option: D
Correct answer
D210.0 g mol−1
Step-by-step explanation
TIPS/FORMULAE:
Osmotic pressure of isotonic solutions are equal.
For solution of unknown substance
For solution of urea,
(concentration)
Given,
as
or
or
Osmotic pressure of isotonic solutions are equal.
For solution of unknown substance
For solution of urea,
(concentration)
Given,
as
or
or
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This is a previous-year question from JEE Main 2007, 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.