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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Surface Chemistry

NTA Abhyas 2020 · Chemistry · Surface Chemistry

The best electrolyte for coagulating A s _ 2 S _ 3 sol is

The best electrolyte for coagulating As2S3A{s}_{2}{S}_{3} sol is

Options

  1. ANaCl
  2. BCuSO4CuS{O}_{4}
  3. CAl{\left(N{O}_{3}\right)}_{3}
  4. DTh{\left(S{O}_{4}\right)}_{2}

Correct answer

D. Th{\left(S{O}_{4}\right)}_{2}

Step-by-step solution

A{s}_{2}{S}_{3}solhasnegativelychargedsolparticlesandtherefore,positiveionsareeffectiveincausingthecoagulatingofsol has negatively charged sol particles and therefore, positive ions are effective in causing the coagulating ofA{s}_{2}{S}_{3}sol.<br/>Coagulatingefficienciesofelectrolytesincreasewiththeincreaseinthevalenceofeffectiveion.Therefore,thebestelectrolyteforcoagulatingsol. <br/>Coagulating efficiencies of electrolytes increase with the increase in the valence of effective ion. Therefore, the best electrolyte for coagulatingA{s}_{2}{S}_{3}solissol isTh{\left(S{O}_{4}\right)}_{2} .
Na+<Cu2+<Al3+<Th4+Na^{+} < Cu^{2 +} < Al^{3 +} < Th^{4 +}
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