Preparation of Lyophobic sols by chemical met | vedclass

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(D) Lyophobic sols are prepared by chemical methods such as double decomposition,oxidation,reduction,and hydrolysis.For example:$1$. Double decomposit

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all of these

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(D) Lyophobic sols are prepared by chemical methods such as double decomposition,oxidation,reduction,and hydrolysis.For example:$1$. Double decomposition: $As_2O_3 + 3H_2S ightarrow As_2S_3 (	ext{sol}) + 3H_2O$$2$. Oxidation: $2H_2S + SO_2 ightarrow 3S (	ext{sol}) + 2H_2O$$3$. Reduction: $2AuCl_3 + 3HCHO + 3H_2O ightarrow 2Au (	ext{sol}) + 3HCOOH + 6HCl$$4$. Hydrolysis: $FeCl_3 + 3H_2O ightarrow Fe(OH)_3 (	ext{sol}) + 3HCl$Since all these methods are used,the correct option is $D$.

Preparation of Lyophobic sols by chemical method involves

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