Most effective coagulant for a colloidal...

Most effective coagulant for a colloidal solution of arsenic sulphide in water is

0 . 1 M sodium phosphate

0 . 1 zinc sulphate

0 . 1 M zinc nitrate

0 . 1 M aluminium chloride

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Coagulation of Colloids

Which out of the following solutions having the same concentration will be most effective in causing the coagulation of the arsenic sulphide sol which is yellowing colour: KCl, MgCl_2, AlCl_3 or Na_3PO_4 ?

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Soaps essentially form a colloidal solution in water and remove the greasy matters by :

AAKASH INSTITUTE ENGLISH-SURFACE CHEMISTRY -Assignment Section - A (Objective type questions)

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