Among the electrolytes Na_2 SO_4, CaCl_2 Al_2(SO_4)_3 and NH_4 Cl , the most effective coagulating agent for Sb_2 ~S_3 sol is

Correct answer: C. Al_2(SO_4)_3 Sb_2 ~S_3 is an anionic sol_2 , therefore cation of highest valency ( Al^ 3+ in the present case) would be most effective coagulating agent.

JEE Advanced 2009Paper 1

Exam: JEE Advanced
Year: 2009
Paper: Paper 1
Subject: Chemistry
Chapter: Surface Chemistry

JEE Advanced 2009 · Paper 1 · Chemistry · Surface Chemistry

Among the electrolytes Na_2 SO_4, CaCl_2 Al_2(SO_4)_3 and NH_4 Cl ,...

Among the electrolytes

\mathrm{Na}_2 \mathrm{SO}_4, \mathrm{CaCl}_2 \quad \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3

and

\mathrm{NH}_4 \mathrm{Cl}

, the most effective coagulating agent for

\mathrm{Sb}_2 \mathrm{~S}_3

sol is

Options

A $\mathrm{Na}_2 \mathrm{SO}_4$
B $\mathrm{CaCl}_2$
C $\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3$
D $\mathrm{NH}_4 \mathrm{Cl}$

Correct answer

C. $\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3$

Step-by-step solution

\mathrm{Sb}_2 \mathrm{~S}_3

is an anionic

\mathrm{sol}_2

, therefore cation of highest valency (

\mathrm{Al}^{3+}

in the present case) would be most effective coagulating agent.

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