JEE Main 2019 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2019 (Online) 9th January Morning Slot
Question
A solution of sodium sulphate contains 92 g of Na+ ions per kilogram of water. The molality of Na+ ions in that solution in mol kg1 is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B4
Step-by-step explanation
Molality of Na+ =
Moles of Na+ = = 4
Mass of H2O = 1 kg
Molality = = 4
Moles of Na+ = = 4
Mass of H2O = 1 kg
Molality = = 4
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This is a previous-year question from JEE Main 2019, 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.