How many of the following are negatively charged sols ? Silver sol, C – InterviewSolution

1.	How many of the following are negatively charged sols ? Silver sol, Cr(OH)_(3) sol, As_(2)S_(3) sol, starch sol, silicic acid sol, haemoglobin, congo red day, prussing blue, gum, clay, charcoal.
Answer» Solution :SILVER sol, `As_(2)S_(3)` sol, STARCH sol, silicic acid sol, congo red dye, gum, clay and CHARCOAL are NEGATIVELY charged sols.

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