Explain what is observed? (i) When a beam of light is passed through a colloidel sol. (ii) An electrolyte, NaCl is added to the hydrated ferric oxide sol. (iii) Electric current is passed through a colloidal sol. (a) Describe Freundlich adsorption isotherm. (b) What do you mean by activity and selectivity of catalysts?

Explain what is observed? (i) When a beam of light is passed through

1.	Explain what is observed? (i) When a beam of light is passed through a colloidel sol. (ii) An electrolyte, NaCl is added to the hydrated ferric oxide sol. (iii) Electric current is passed through a colloidal sol. (a) Describe Freundlich adsorption isotherm. (b) What do you mean by activity and selectivity of catalysts?
Answer» Solution :(i) Scattering of light took place/Tyndal effect. (ii) Coagulation took place (III) Electrophoresis/Coagulation took place. `(x)/(m)=K.P^(1//n)(n gt 1)` `log m=K+(1)/(n)logp` Activity means how many times catalyst is going to INCREASE the RATE of REACTION and selectivity is its ability to direct a reaction to YIELD a particular product.