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Standard XII
Chemistry
Methods to Form Lyophobic Colloids
Which of the ...
Question

Which of the following is a hydrophobic colloidal sol?

A
Barium sulphate sol
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B
Arsenious sulphide sol
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C
Starch sol
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D
Silver iodide sol.
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Solution

The correct option is C Starch sol
Starch sol is hydrophilic in nature due to the presence of glucose molecules joined together by glycosydic linkage. Rest of the sols are soluble in water since they dissociate into their respective ions

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