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Explain what is observed :- an electroly...

Explain what is observed :- an electrolyte, NaCl is added to hydrated ferric oxide sol.

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Ferric oxide solution gets precipitated on addition of an electrolyte NaCl.
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The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal part!cles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation, by electrophoresis, by persistent dialysis or by heating or cooling. What is precipitation ?

The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal part!cles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation, by electrophoresis, by persistent dialysis or by heating or cooling. What is electrophoresis ?

The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal part!cles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation, by electrophoresis, by persistent dialysis or by heating or cooling. Which charge is responsible for stability of colloidal particles ?

what is the correct sequence of the decreasing coagultion value of the following electrolyte for the coagultion of ferric hydroxide sol ? (I) Na_(3) PO_(4) (II)KCl (III) K_(2)SO_(4) (IV)K_(4)[Fe(CN)_(6)]

OMEGA PUBLICATION-SURFACE CHEMISTRY-MULTIPLE CHOICE QUESTIONS
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  3. How will you convert ethyne into vinyl cyanide.

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  4. Draw structure of 1,3-dimethyl cyclopent-1-ene

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  5. What will happen when ethyne treated with hydrogen iun presence of pla...

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  6. What will happen when propyne treated with hydrogen in presence of nic...

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  7. What is lindlar"s catalyst?

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  8. What is birch reduction?

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  9. Sodium salt of which acid will be needed for the preparation of propan...

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  10. Name a product obtained by heating butanoic acid with soda lime at 630...

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  11. Which salt on treatment with soda lime gives ethane?

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  12. Draw the structure of following : 2-methyl-3-isopropyl heptane.

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  13. Draw the structure of following : dicyclopropyl methane

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  14. Draw the structure of following : n C4H10

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  15. Write iupac name of following : CH2=CH2

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  16. Write iupac name of following : CH3-CH=CH2

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  17. Write iupac name of following : CH3-CH2-CH=CH2

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  18. Write iupac name of following : CH3-CH=CH-CH3

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  19. Write iupac name of following : CH3(CH2)2CH=CH2

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  20. Write iupac name of following : CH3(CH2)3CH=CH2

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  21. Write iupac name of following : CH2=C(CH3)2

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