What are the physical states of dispersed phase and dispersion medium in foam rubber ?
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Figure 10.1 shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is
(a) √3/√2 is the correct option
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Define (a) Juvenile phase, (b) Reproductive phase, (c) Senescent phase.
(a) Juvenile phase: It is the period of growth in an individual organism after its birth and before it reaches reproductive maturity. (b) Reproductive phase: It is the period when an individual organism...
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How are the following colloids different from each other in respect of dispersion medium and dispersed medium ? Give one example of each type.
[Hint : D.P. D.M. Example (a) Solid/liquid ...
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How are colloids classified on the basis of (i) Physical states of components (ii) Nature of dispersion medium and
Colloids can be classified on various bases: (i) On the basis of the physical state of the components (by components we mean the dispersed phase and dispersion medium). Depending on whether...
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How foam is produced ?? Why foaming of soap occurs ??
A foam is a substance formed by trapping pockets of gas in a liquid or solid. A bath sponge and the head on a glass of beer are examples of foams. In most foams,...
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Riya performs two set of experiments to study the length of the foam formed which are as follows:
Set I will have more length of foam because it consists of soft water. Set II will form less foam because it consists of hard water due to the presence of...
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Two sine waves travel in the same direction in a medium. The amplitude of each wave is A and the phase difference between the two waves is 120°.
The correct answer is (a) A EXPLANATION: The resultant amplitude y = A sin(⍵t-kx) + A sin(⍵t-kx+120°) →y = 2A Sin(⍵t-kx+60°)*cos60° →y = A sin(⍵t-kx+60°) Hence the resultant amplitude is A.
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How are the following colloids different from each other in respect of dispersion medium and dispersed phase? Give one example of each type.
Type of Colloid Dispersed Phase Dispersion medium Example Aerosol Solid or liquid Gas Smoke, Fog, Cloud Hydrosol Solid Water Starch sol, Protein sol Emulsion Liquid Liquid Milk, hair cream
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How are the following colloids different from each other in respect of their dispersion medium and dispersed phase? Give one example of each.
Aerosol Emulsion Hydrosol 1. Sols in which the dispersion medium is gas and dispersed phase is solid or liquid. For example: Smoke, d 1. A colloidal system in which dispersion medium and dispersed phase...
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Present a classification of colloids where dispersion medium is water. State the characteristics and one example of each of these classes.
When the dispersion medium is water colloids are classified as hydrophilic colloids and hydrophobic colloids. Hydrophilic colloids are solvent (water) attracting, reversible and quite stable, e.g., gum, starch, gelatin etc....
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