Surface Chemist...

During the adsorption of Krypton on activated charcoal at low temperature  

Size of colloidal particles may range from            

Select correct statement (s) :           

Gold number of haemoglobin is 0.03. Hence, 100 mL of gold sol will require haemoglobin so that gold is not coagulated by 10 mL of 10% NaCl solution:    

Which one of the following statements is correct:           

What can adsorb larger volume of hydrogen gas :           

Statement-1 : All colloidal dispersions give very low osmotic pressure and show very small freezing point depression or boiling pointelevation.

Statement-2 : Tydall effect is due to scattering of light from the surface of colloidal particles.

Statement-1 : The Brownian movement is due to the bombardment of   collodial particles by the molecules of dispersion medium which are in the constant motion like molecules in a gas.

Statement-2 : Brownian movement provides a visible proof of the random kinetic motion of molecules in a liquid.     

Statement-1: In the coagulation of negatively charged arsenic sulphide soil, the coagulating power decreases in the order, Al³⁺ >Ba²⁺ >Na⁺ .

Statement-2 : Generally greater the valence of coagulating ion, the  greater is its power of coagulation.

Assertion : Isoelectric point is  pHpH  at which colloidal can move towards either of electrode.
Reason : At isoelectric point coolidal particles becomes electrically netural .