In a colloidal state, the particle size of he dispersed phase ranges between `10^(3)` to `10^(6)` pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol.
Lyophilic sols are more stable than lyophobic sols because
A. The colloidal particles have positive charge
B. The colloidal particles have no charge
C. The colloidal particles are solvated
D. There are strong electrostatic repulsions between the negatively charged colloidal particules.

In a colloidal state, the particle size of he dispersed phase ranges between `10^(3)` to `10^(6)` pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol.
On adding feq drops of dilute HCl to freshly precipitated ferric hydroxide, a red coloured colloidal sol is obtained. The phenomenon is Known as:
A. Peptisation
B. Dialysis
C. Protective action
D. Dissolution.

In a colloidal state, the particle size of he dispersed phase ranges between `10^(3)` to `10^(6)` pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol.
Small amount of ferric chloride `(FeCl_(3))` solution is added to freshly prepared and well washed `Fe(OH)_(3)` precipitate :
A. `Fe(OH)_(3)` is dissolved forming `FeCl_(3)`
B. A raddish brown positively charged sol `[Fe(OH)_(3)] Fe^(3+)` is formed due to peptasation.
C. Areddish brown negatively charged sol `[Fe(OH)_(3)]:3Cl^(-)` is formed due to peptisation
D. A double salt `Fe(OH)_(3).FeCl_(3)` is formed.

In a colloidal state, the particle size of he dispersed phase ranges between `10^(3)` to `10^(6)` pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol
`[AgI]I^(-)` colloidal sol can be coagulated by the addition of a suitable action. 1 mol of `[AgI]I^(-)` required mole of `AgNO_(3), Pb (NO_(3))_(2)` and `Fe(NO_(3))_(3)` as:
A. `1,1,1`
B. `1,2,3`
C. 1,1//2,1//3`
D. `6,3,2`

In a colloidal state, the particle size of he dispersed phase ranges between `10^(3)` to `10^(6)` pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol.
0.025 g of starch sol is required to prevent the coagulatio of 10 mL of gold sol when 1 mL of `10%` NaCl solution is present. The gold number of strach sol is :
A. 0.025
B. `2.5xx10^(-5)`
C. `0.25
D. 25

In a colloidal state, the particle size of he dispersed phase ranges between `10^(3)` to `10^(6)` pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol.
The areseneous sulphide sol has negative (-) charge. The maximum power to precipitate it is of :
A. `H_(2)SO_(4)`
B. `Na_(3)PO_(4)`
C. `CaCl_(2)`
D. `AlCl_(3).`