How many of the following are negatively charged sols? Pt,Au,Ag,Fe(OH) – InterviewSolution

1.	How many of the following are negatively charged sols? Pt,Au,Ag,Fe(OH)3,Al(OH)3, As2S3,starch,clay,H4SiO4,eosin, methyleneblue,Haemoglobin,Cu,CdS, Congored,Cr(OH)3
Answer» How many of the following are negatively charged sols? $P t, A u, A g, F e (O H)_{3}, A l (O H)_{3}$ , $A s_{2} S_{3}, s t a r c h, c l a y, H_{4} S i O_{4}, e o s i n$ , $m e t h y l e n e b l u e, H a e m o g l o b i n, C u, C d S$ , $C o n g o r e d, C r (O H)_{3}$

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