Question

1. Colloidal particles always carry an electric charge. The origin of the charge on the sol particles in most cases is due to the preferential adsorption of either positive or negative ions on their surface. The other factors responsible could be dissociation of surface molecules and frictional electrification. The presence of equal and similar charges on colloidal particles provide stability to the colloidal solution. (i) In case two or more ions are present in the

medium, which ion gets preferentially adsorbed? (ii) How does an equal and similar charge gives stability to the colloidal solution? R

(ii) Define Helmholtz electrical double layer. (iv) During electrophoresis in colloids, to which electrode do the positively charged and negatively charged particles move? A

(v) What happens when silver nitrate solution is A&E added to potassium iodide solution?​

Answer 1

Answer:

expressing or meaning a refusal or denial. a negative answer. 2 lacking positive or affirmative qualities, such as enthusiasm, interest, or optimism. 3 showing or tending towards opposition or resistance