CBSE
Multiple Choice QuestionsWhen a sulphur sol is evaporated sulphur is obtained .On mixing with water sulphur sol is not formed .The sol is :
lyophilic
reversible
hydrophobic
hydrophilic
Correct equation of Freundlich isotherm is
Butter is an example of which type of colloid?
Solid in liquid
Liquid in solid
Liquid in liquid
Gas in liquid
A lyophobic colloid is :
As2S3
starch
agar - agar
gelatin
In coagulating the colloidal solution of As2S3 .which has the minimum coagulating value ?
NaCl
KCl
BaCl2
AlCl3
The rust of iron is catalysed by which of the following ?
Fe
O2
Zn
H+
An example for autocatalysis is :
oxidation of NO to NO2
oxidation of SO2 to SO3
decomposition of KClO3 to KCl and O2
oxidation of oxalic acid by acidified KMnO4
Which of the following is correct according to Freundlich adsorption isotherm ?
po
p
p1/n
Which of the following is incorrect for physisorption?
Reversible
Increases with increase in temperature.
Low heat of adsorption.
Increases with increase in surface area.
Which one of the following is not a surfactant?
CH3-(CH2)14-CH2-NH2
CH3-(CH2)16-CH2OSO2-Na+
OHC-(CH2)14-CH2-COO-Na+
