JEE Main 2013ChemistrySurface ChemistryEasyMCQ

JEE Main 2013Surface Chemistry Question with Solution

JEE Main 2013 (07 Apr)

Question

The coagulating power of electrolytes having ions Na+,  Al3+ and Ba2+ for arsenic sulphide sol increases in the order,

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Show full solutionCorrect option: D
Correct answer
DNa+<Ba2+<Al3+

Step-by-step explanation

As2S3 /S2- is negatively charged sol.

According to the Hardy Schulze rule, the greater the charge on the cation (oxidation state), the greater is its coagulating power for the negatively charged sol. Hence, the increasing order is:

Na + < Ba 2 + < Al 3 + 

Al 3 +  (highest coagulating power).

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About this question

This is a previous-year question from JEE Main 2013, covering the Surface 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.