Peptisation involves
precipitation of colloidal particles
disintegration of colloidal aggregates
evaporation of dispersion medium
impact of molecules of the dispersion medium on the colloidal particles
In Langmuir's model of adsorption of a gas on a solid surface,
the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered
the adsorption at a single site on the surface may involve multiple molecules at the same time
the mass of gas striking a given area of surface is proportional to the pressure of the gas
the mass of gas striking a given area of surface is independent of the pressure of the gas
Which one of the following is most effective in causing the coagulation of an As2S3 sol?
KCl
AlCl3
MgSO4
K3Fe(CN)6
The continuous phase contains the dispersed phase throughout, example is
water in milk
fat in milk
water droplets in mist
oil in water
Peptization denotes
digestion of food
hydrolysis of proteins
breaking and dispersion into colloidal state
precipitation of solid from colloidal dispersion
Blue colour of water in sea is due to
refraction of blue light by impurities
refraction blue sky by water
scattering of light by water
None of the above
In ...... process, work is done at the expense of internal energy.
isothermal
isochoric
adiabatic
isobaric
Which of the following is not true about a catalyst?
Mechanism of the reaction in presence and absence of catalyst could be different.
Use of catalyst cannot change the order of the reaction
Catalyst enhances both forward and backwards reaction at equal rate.
Catalyst participates in the reaction, but not consumed in the process.