1.

Which of the following can stabilize gold sol from coagulation by \[NaCl\]  solution

A.        \[Fe{{(OH)}_{3}}\]
B.        Gelatin
C.        \[A{{s}_{2}}{{S}_{3}}\]  
D.        None of these
Answer» C.        \[A{{s}_{2}}{{S}_{3}}\]  


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