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Colloid of which one fo the following can be prepared by electrical dispersion as well as reduction method?

(a) Sulphur

(b) Ferric hydroxide

(c) Arsenious sulphide

(d) Gold

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Answer: Gold
Gold colloid can be prepared by Bredig arc method as well as by reduction of $AuCl_3$ with $SnCl_2.$


answered Dec 14, 2013 by mosymeow_1
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