Question

Fexplane ferric oxide sole gets coagulated on added of sodium cloride solution

Answer 1

Fe(OH)3 is a positively charged colloid which is coagulated by the addition of NaCl means by the addition of Cl-.

(ii) It removes poisonous gases by the adsorption and hence smoke which is free from poisonous gases comes out.

(iii) In physical adsorption there are weak vander waal forces of attraction therefore it forms multilayer whereas in chemical adsorption, there are strong force of attraction, hence it forms monolayer.