Worksheetssurface chemistry
Total questions: 10
Worksheet time: 5mins
The formation of micelles takes place only above
Inversion temperature
Boyle’s temperature
Critical temperature
Kraft temperature
The stability of lyophobic sols is due to
adsorption of covalent molecules on the colloid
the size of the particles
the charge on particles
Tyndall effect.
Physical adsorption of a gaseous species may change to chemical adsorption with ___________ .
decrease in temperature
increase in temperature
increase in surface area of adsorbent
decrease in surface area of adsorben
When a small amount of FeCl3 is added to a freshly precipitated Fe(OH)3, b reddish brown colloidal solution is obtained. This pheno¬menon is known as
dialysis
peptization
protection
dissolution
Enzyme work at specific pH and optimum temperature.
true
false
which of the following does not shows tyndall effect
milk
emulsion
blood
sugar solution
Butter is a colloid form in which
fat is dispersed in solid casein
fat globules are dispersed in water
water is dispersed in fat
suspension of casein is in water
Foam is a colloidal solution of
gaseous particles dispersed in gas
gaseous particles dispersed in liquid
Solid particles dispersed in liquid
Solid particles dispersed in gas
a negetive catalyst or inhibitor is one
which retards the rate of reaction
takes the reaction in forward direction
promotes the side reaction
none of these
alum helps in purifying water by
foaming Si complex with clay particles
Sulphate part which combines whit the dirt and removes it
aluminium which coagulates the mud particles
Making mud water soluble
