How of the following are positively charged sols ? Cu sol, Ag sol, CdS, As_(2)S_(3), Fe(OH)_(3), Al(OH)_(3) methylene blue.

How of the following are positively charged sols ? Cu sol, Ag sol, Cd

1.	How of the following are positively charged sols ? Cu sol, Ag sol, CdS, As_(2)S_(3), Fe(OH)_(3), Al(OH)_(3) methylene blue.
Answer» Answer :C-4 `FE(OH)_(3),AL(OH)_(3)`,METHYLENE BLUE