When colloids are subjected to an electrical field particles move towards an electrode and precipitate. Name the process.
Which property is represented by the following figure;
Which law is represented by the following expression?
For a positive colloid the order of precipitation is : Phosphate ion>sulphate ion >chloride ion.
Which substance is added to water containing suspended impurities to coagulate the suspended impurities and make water fit for drinking purposes.
The simplest way to check whether a system is a colloid is by using:
The Tyndall Effect is the effect of light scattering in colloidal dispersion, while showing no light in a true solution. This effect is used to determine whether a mixture is a true solution or a colloid.
Which method cannot be used for the coagulation of the lyophobic sol?
Coagulation is the destabilization of Colloids by neutralizing the electric charge of the dispersed phase particles, which results in aggregation of the colloidal particles.
Lyophilic colloids that shows the property of protecting lyophobic colloids are also called as:
Which of the following forms a colloidal solution in water?
The factors which are responsible for the stability of lyophilic sols are:
The Brownian motion is due to:
Which property of colloids is applied in rubber plating & sewage disposal?
In Tyndall effect the colloidally suspended particles:
Ferric hydroxide is a negative sol, which of the following electrolyte will coagulate it most:
What is aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte called?
Aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte is called coagulation.
A fresh precipitate can be transformed into colloidal sol by:
Which statement describes coagulation value?
Which electrolyte will precipitate a negatively charged colloids (As2S3 sol) to a greater extend?
The process in which colloid is placed inside a bag of semi permeable membrane like cellophane or parchment paper which permits ions and not colloids to pass through, is called as:
Which of the following will have the highest coagulating power for As2S3 colloids?
The correct answer is Option A.
AS2S3 is an anionic sol (negative sol) hence coagulation will depend on coagulating power of cation , which is directly proportional to the valency of the cation (Hardy-Schulze rule).
Hence positive ions having maximum amount of charge will have more coagulation thus, Al3+ have maximum coagulating power.
What is scattering of light by mist on head light of vehicles called?