Single Choice

For coagulation of arsenious sulphide sol, which one of the following salt solution will be most effective?

A$$AlCl_3$$
Correct Answer
B$$NaCl$$
C$$BaCl_2$$
D$$Na_3PO_4$$

Solution

Sulphide is$$ -ve$$ charged colloid so cation with maximum charge will be most effective for coagulation.
$$Al^{3+} > Ba^{2+} > Na^+$$ coagulatimg power.

SIMILAR QUESTIONS

Surface Chemistry

The coagulating power of electrolytes having ions $$Na^{+},\ Al^{3+}$$ and $$Ba^{2+}$$ for arsenic sulphide sol increases in the order:

Surface Chemistry

Among the electrolytes $$Na_2SO_4,\: CaCl_2,\:Al_2(SO_4)_3$$ and $$NH_4Cl,$$ the most effective coagulating agent for $$Sb_2S_3$$ solution is:

Surface Chemistry

A sol has positively charged colloidal particles. Which of the following solutions is required in the lowest concentration for coagulation?

Surface Chemistry

As per Hardy-Schulze formulation, the flocculation value of the following for ferric hydroxide sol are in the order :

Surface Chemistry

Which of the following will be the most effective in the coagulation of $$Fe(OH)_3$$ sol?

Surface Chemistry

In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by

Surface Chemistry

Which of the following is most effective electrolyte in the coagulation of $$AgI/ Ag^{+}$$ sol? $$K_{2}SO_{4}, MgCl_{2}, K_{4}[Fe(CN)_{6}]$$.

Surface Chemistry

Which one of the following electrolytes is the most effective for the coagulation of $$Fe(OH)_{3}$$ sol and why? $$NaCl, Na_{2}SO_{4}, Na_{3}PO_{4}$$.

Surface Chemistry

Answer the following questions. Out of $$MgCl_{2}$$ and $$AlCl_{3}$$, which one is more effective in causing coagulation of negative charged sol and why?

Surface Chemistry

Answer the following question. Out of $$H_{2}SO_{4}$$ and $$H_{3}PO_{4}$$, which one is more effective in causing coagulation of positively charged sol? Give reason.

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