JEE Main 2010 — Solutions Question with Solution
From: AIEEE 2010
Question
If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous
solution, the change in freezing point of water (∆Tf), when 0.01 mol of sodium sulphate is dissolved
in 1 kg of water, is (Kf = 1.86 K kg mol–1)
Choose an option
Show full solutionCorrect option: B
Correct answer
B0.0558 K
Step-by-step explanation
Sodium sulphate dissociates as
hence van't hoff factor
Now
hence van't hoff factor
Now
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This is a previous-year question from JEE Main 2010, 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.