Which mixture of solutions will lead to the formation of a negatively charged colloidal sol?
Adding KI solution to AgNO₃ solution, with AgNO₃ in excess
Adding equal volumes of AgNO₃ and KI solutions
Adding AgNO₃ solution to KI solution, with KI in excess
Adding KI solution to AgNO₃ solution, with KI in smaller amount
Related Questions
Mention the type of reaction to obtain .
Reaction,
Hydrolysis
Oxidation
Reduction
Double decomposition
Which is not a property of hydrophilic sols?
High concentrations of dispersed phase can be easily attained
Coagulation is reversible
Viscosity and surface tension are about the same as of dispersion medium
The charge of the particle depends on the pH values of the dispersion medium; it may be positive, negative
Which of the following colloidal solutions does not contain negatively charged particles
Starch
Gold Sol
Which of the following reactions lead to the formation of colloidal solution?
Cloud bursts due to :
Attraction towards the electrical charges on the earth
Large amount of water present in the cloud
Dense clouds are present in the upper atmosphere
Mutual discharge of oppositely charged clouds resulting in the coagulation
The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively. Which of the following statements is not correct?
When colloidal iron (III) hydroxide is mixed with colloidal gold, coagulation occurs.
Colloidal iron (III) hydroxide can be precipitated by adding an electrolyte that provides oppositely charged ions.
Colloidal gold particles are stable in the presence of an electrolyte that provides negatively charged ions.
Adding a small amount of electrolyte to a colloidal solution can stabilize it by providing a layer of oppositely charged ions.
Below critical micelle concentration (CMC)
Salt behaves as normal electrolyte
Substances like grease, fat dissolve by emulsification
The viscosity of solution is very high
Surfactant molecules undergo association to form cluster
In a stable colloidal solution, the zeta potential is expected to be:
Close to zero
Low and positive
Low and negative
High (positive or negative)
Lyophilic sols are more stable than lyophobic sols because the particles
of the dispersed phase have a strong affinity for the dispersion medium
of the dispersed phase have a weak affinity for the dispersion medium
the dispersed phase particles are larger
the dispersed phase particles are smaller
Which is not the correct matching of emulsions
Milk : O/W
Cold Cream : W/O
Butter : O/W
Vanishing cream : O/W
