Single Choice

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

A$$\mathrm{N}\mathrm{a}\mathrm{Cl}$$
B$$\mathrm{K}_{4}[\mathrm{F}\mathrm{e}(\mathrm{C}\mathrm{N})_{6}]$$
Correct Answer
C$$\mathrm{Z}\mathrm{n}\mathrm{Cl}_{2}$$
D$$\mathrm{N}\mathrm{a}_{2}\mathrm{S}\mathrm{O}_{4}$$

Solution

A sol has positively charged colloidal particles. $${ K }_{ 4 }\left[ { Fe\left( CN \right) }_{ 6 } \right] $$ is required in low concentrations for coagulation.

According to Hardy Schulze rule, the ion having a positive charge to sol particles cause coagulation and greater the valency of the oppositely charged ion more is the coagulating 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

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

Surface Chemistry

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

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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