Multiple Choice QuestionsAdsorption of a gas follows Freundlich adsorption isotherm. x is the mass of the gas adsorbed on mass m of the adsorbent. The plot of log versus log p is shown in the given graph. is proportional to :
p3/2
P3
P2
P2/3
A gas undergoes physical adsorption on a surface and follows the given freundlich adsorption isotherm equation . Adosrption of the gas increases with:
increase in P and decrease in T
Decrease in P and decrease in T
Increase in P and Increase in T
Decrease in P and Increase in T
Match the catalysts (colum I) with products (column II).
| Catalyst - Column I | Products - Column II |
| A. V2O5 | (i) Polyethylene |
| B. TiCl4/ Al(Me)3 | (ii) Ethanal |
| C. PdCl2 | (iii) H2SO4 |
| D. Iron oxide | (iv) NH3 |
A - iii; B - i; C - ii; D - iv
A - ii; B - iii; C - i; D - iv
A - iv; B - iii; C - ii; D - i
A - iii; B - iv; C - i; D - ii
The aerosol is a kind of colloid in which:
Solid is dispersed in gas
liquid is dispersed in water
gas is dispersed in liquid
gas is dispersed in solid
The correct option among the following is :
Colloidal particles in lyophobic sols can be precipitated by electrophoresis.
Brownian motion in colloidal solution is faster if the viscosity of the solutions is very high.
Addition of alum water makes it unfit for drinking.
Colloidal medicines are more Effective because they have small surface area
Which property of colloidal solution is independent of charge on the colloidal particles?
Coagulation
Electrophoresis
Electroosmosis
Tyndall effect
D.
Tyndall effect
Coagulation is generally brought about by the addition of electrolytes. When an electrolyte is added to a colloidal solution, the particles of the sol take up the ions which are oppositely charged. As a result, their charge gets neutralised.
Electrophoresis: The movement of colloidal particles under an applied electric potential is called electrophoresis. Electroosmosis may be defined as a phenomenon in which the molecules of the dispersion medium are allowed to more under the influence of an electric field whereas colloidal particles are not allowed to more.
Tyndall effect is the scattering of light by sol particles, which cannot be affected by change on them
Which property of colloids is not dependent on the charge on colloidal particles?
Coagulation
Electrophoresis
Electro-osmosis
Electro-osmosis
The ease of adsorption of the hydrated alkali metal ions on an ion exchange resins follows the order
Li+ > K+ >Na+> Rb+
Rb+ < K+ < Na+ < Li+
K+ >Na+> Rb+ > Li+
K+ >Na+> Rb+ > Li+
The protecting power of lyophilic colloidal sol is expressed in terms of
Coagulation value
Gold number
Critical micelle concentration
Critical micelle concentration
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