1.

Which one of the sols acts as protective colloid [MP PMT 1990; MP PET 1990, 92; RPET 2003]

A. \[A{{s}_{2}}{{S}_{3}}\]
B. Gelatin
C. \[Au\]
D. \[Fe{{(OH)}_{3}}\]
Answer» C. \[Au\]


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