The gold numbers of three protective colloids A, B, and C are 0.05, 0.01 and 0.5 respectively. The decreasing order of their protective power is
B, C, A
A, B, C
B, A, C
C, A, B
In Freundlich adsorption isotherm, the intercept is equal to
k
log k
1/n
log x/m
Which of the following biomolecules acts as specific catalysts in biological reaction
Carbohydrates
Lipids
Vitamins
Enzymes
If a solid is dispersed in a liquid the colloid is called
Lyosol
Emulsion
Gel
Acrosol
One atom of 3919K contains:
19p;20n and 19e-
19p;20n and 20e-
20p;19n and 20e-
20p;19n and 19e-
Which of the following is a lyophobic colloidal solution ?
Aqueous starch solution
Aqueous protein solution
Gold sol
Polymer solutions in some organic solvents
The nature of forces operating between the adsorbate and the adsorbent in the adsorption occurring at high temperature is
Vander waals forces
Chemical forces
Gravitational forces
Fermi forces
The gold numbers of three protective colloids A, B, and C are 0.05, 0.01 and 0.5 respectively. The decreasing order of their protective power is:
Chemisorption involves
Bi-layered
zero layered
Uni layered
Multi layered
Gold number is used to show
Protective power of lyophillic colloids
Protective power of lyophobic colloid
Peptisation power of a colloid
Precipitation power of a colloid
The decomposition of H2O2 may be decreased by adding a small quantity of glycerol.This is an example of
Neutralisation
Negative catalysis
Positive catalysis
Catalytic poisoning
The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively are :
solid, solid, lyophobic
liquid , liquid , lyophobic
solid, liquid, lyophobic
solid, liquid, lyophilic