Fog is an example of-
Important Questions on Chemistry
Which of the following properties are characteristics of lyophobic sols?
1. Low viscosity
2. High viscosity
3. Reversibility
4. Coagulation by electrolytes at low concentrations
Select the correct answer using the code given below.
Match the List I with the List II.
List I List II
A. Molarity 1. is the concentration (M) unit for ionic compounds which dissolve in a polar solvent to give pair of ions.
B. Molality 2. is number of gram (m) equivalents of substance dissolve per litre of the solution
C. Formality 3. is the number of (F) moles of the solute dissolved in 1000 of the solvent
D. Normality 4. is the number of (N) moles of solute present in 1 L of the solution
Match List I (Colloidal dispersion) with List II (Nature of the dispersion) and select the correct answer using the codes given below the List.
List I List II
A. Milk 1. Solid in liquid
B. Clouds 2. Liquid in gas
C. Paints 3. Solids in solids
D. Jellies 4. Liquids in liquids
5. Liquid in solid
Match the List I with the List II.
List I List II
A. Tyndall effect 1. Dispersion of finely divided droplets in another liquid
B. Brownian movement 2. Flocculation and settling down of the discharged sol particles.
C. Coagulation 3. Zig-zag movement executed by a colloidal particle in the dispersion medium.
D. Emulsion 4. Scattering of light by the particles.
Match the List I with the List II.
List I List II
A. Dialysis 1. Precipitate converts to colloidal solution
B. Peptization 2. Precipitation of colloidal solution
C. Flocculation 3. Protective power
D. Gold number 4. Purification of colloidal solution
Consider the following statements
1. Liquid drops are spherical due to surface tension forces.
2. Surfactants are surface active agents which decrease surface tension e.g. ,Soaps and detergents.
3. Surface tension of a liquid is measured with the help of apparatus called stalgmometer.
Which of the statements given above are correct ?
