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प्रश्न
Explain Electrophoresis diagramatically.
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उत्तर
Electrophoresis set up is shown in the diagram below:
- The diagram shows a U tube set up in which two platinum electrodes are dipped in a colloidal solution.
- When an electric potential is applied across two electrodes, colloidal particles move towards one or other electrode.
- The movement of colloidal particles under an applied electric potential is called electrophoresis.
- Positively charged particles move towards the cathode while negatively charged particles migrate towards the anode and get deposited on the respective electrode.
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संबंधित प्रश्न
Define the following with a suitable example, of each:
Multimolecular colloid
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- milk
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- printing ink
- fog
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Explain the term emulsion and types of emulsions.
Draw labelled diagram Tyndall effect.
Draw labelled diagram of Bredig’s arc method.
Identify the CORRECT statements from the following.
i. The colour of colloidal dispersion depends on size of colloidal particles.
ii. Tyndall effect is used to distinguish between colloidal dispersion and true solution.
iii. Eosin and congo red are examples of negatively charged sols.
In coagulation of positively charged ferric hydroxide sol, the most and least effective ions are ____________ and ____________ respectively.
The order of coagulating power of following ions in the coagulation of a positive sol is:
i. \[\ce{PO^{3-}_4}\]
ii. \[\ce{SO^{2-}_4}\]
iii. \[\ce{[Fe(CN)6]^{4-}}\]
iv. \[\ce{NO^-_3}\]
Maximum coagulation power is in ____________.
Tyndall effect is observed due to ____________.
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The movement of colloidal particles towards respective electrode under electric field is called ______.
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(i) heating
(ii) adding more amount of dispersion medium
(iii) freezing
(iv) adding emulsifying agent
What is collodion?
What happens when electric field is applied to colloidal solution?
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Toluene is oxidised to benzoic acid by
The coagulation of 200 ML of position sol took place when 0.73 HCL was added to its without changing the volume much. The flocculation value of HCL for the colloid is.
Fog is a colloidal solution of ______.
The migration of dispersion medium under the influence of an electric potential is called ______.
Blood may be purified by ______.
Identify the correct decreasing order of precipitation power of flocculating ion added, from following.
