JEE Main 2013 Chemistry question
Not in JEE Main or NEET syllabus
The coagulating power of electrolytes having ions Na⁺, Al³⁺ and Ba²⁺ for arsenic sulphide sol increases in the order -
Answer: (4)
Solution
As₂S₃ is a negative sol; coagulating power is proportional to the magnitude of the opposite charge (Hardy-Schulze rule): Na⁺ < Ba²⁺ < Al³⁺.