Home
Class 12
CHEMISTRY
A freshly prepared Fe(OH)(3) precipitate...

A freshly prepared `Fe(OH)_(3)` precipitate is peptized by adding `FeCl_(3)` solution. The charge on the colloidal particle is due to preferential adsorption of

A

`Cl^(-)` ions

B

`Fe^(+++)` ions

C

`OH^(-)` ions

D

None

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    ALLEN|Exercise EXERCISE -2|21 Videos

  • SURFACE CHEMISTRY

    ALLEN|Exercise ASSERTION & REASO|21 Videos

  • Some Basic Concepts of Chemistry (Mole concept)

    ALLEN|Exercise All Questions|39 Videos

  • TEST PAPER

    ALLEN|Exercise Exercise (Chemstry)|29 Videos

Similar Questions

Explore conceptually related problems

The charge on the colloidal particle is due to preferential adsorption of inos.

Arsenic sulphide sol is prepared by passing H_2S through As_2O_3 solution . The charge developed on sol particles is due to the adsorption of

Why is Fe(OH)_(3) colloid positively charged when prepared by adding FeCl_(3) to hot water ?

Arsenous sulphide sol is prepared by passing H_(2) through arsenous oxide solution . The charge developed on the particles is due to adsorption of :

The colloidal particles are electrically charged as a indicated by their migration towards cathode or anode under the applied electric field. In a particular colloidal system, all particles carry either positive charge or negative charge. The electric charge on colloidal particles orginate in several ways. According to preferential adsorption theory, the freshly obtained precipitate particles adsorb ions from the dispersion medium, which are common to their lattice and acquire the charge of adsorbed ions. For example, For example, freshly obtained Fe(OH)_(3) precipitated is dispersed, by a little FeCl_(3) , into colloidal solution owing to the adsorption of Fe^(3+) ions in preference. Thus sol particles will be positively charged. In some cases the colloidal particles are aggregates of cations or anions having ampiphilic character. When the ions posses hydrophobic part (hydrocarbon end) as well as hydrophilic part (polar end group), they undergo association in aqueous solution to form particles having colloidal size. The formation of such particles, called micelles plays a very important role in the solubilization of water insoluble substances, (hydrocarbon, oils, fats, grease etc.). In micelles, the polar end groups are directed towards water and the hydrocarbon ends into the centre. The charge on sol particles of proteins depends on the pH. At low pH, the basic group of protein molecule is ionized (protonated) and at higher pH (alkaline medium), the acidic group is ionized. At isoelectric pH, characteristic to the protein, both basix and acidic groups are equally ionized. The stability of colloidal solution is attributed largely to the electric charge of the dispersed particles. This charge causes them to be coagulated or precipitated. On addition of small amount of electrolytes, the ions carrying oppiste charge are adsorbed by sol particles resulting in the neutralization of their charge. When the sol particles either with no charge or reduced charge, come closer due to Brownian movement, they coalesce to form bigger particles resulting in their separation from the dispersion medium. This is what is called coagulating or precipitation of the colloidal solution. The coagulating power of the effective ion, which depend on its charge, is expressed in terms of its coagulating value, defined as its minimum concentration (m mol/L) needed to precipitate a given sol. Which of the following ions would have the minimum coagulating value for sol obtained on peptizing Sn(OH)_(4) by little NaOH solution?

The colloidal particles are electrically charged as a indicated by their migration towards cathode or anode under the applied electric field. In a particular colloidal system, all particles carry either positive charge or negative charge. The electric charge on colloidal particles orginate in several ways. According to preferential adsorption theory, the freshly obtained precipitate particles adsorb ions from the dispersion medium, which are common to their lattice and acquire the charge of adsorbed ions. For example, For example, freshly obtained Fe(OH)_(3) precipitated is dispersed, by a little FeCl_(3) , into colloidal solution owing to the adsorption of Fe^(3+) ions in preference. Thus sol particles will be positively charged. In some cases the colloidal particles are aggregates of cations or anions having ampiphilic character. When the ions posses hydrophobic part (hydrocarbon end) as well as hydrophilic part (polar end group), they undergo association in aqueous solution to form particles having colloidal size. The formation of such particles, called micelles plays a very important role in the solubilization of water insoluble substances, (hydrocarbon, oils, fats, grease etc.). In micelles, the polar end groups are directed towards water and the hydrocarbon ends into the centre. The charge on sol particles of proteins depends on the pH. At low pH, the basic group of protein molecule is ionized (protonated) and at higher pH (alkaline medium), the acidic group is ionized. At isoelectric pH, characteristic to the protein, both basix and acidic groups are equally ionized. The stability of colloidal solution is attributed largely to the electric charge of the dispersed particles. This charge causes them to be coagulated or precipitated. On addition of small amount of electrolytes, the ions carrying oppiste charge are adsorbed by sol particles resulting in the neutralization of their charge. When the sol particles either with no charge or reduced charge, come closer due to Brownian movement, they coalesce to form bigger particles resulting in their separation from the dispersion medium. This is what is called coagulating or precipitation of the colloidal solution. The coagulating power of the effective ion, which depend on its charge, is expressed in terms of its coagulating value, defined as its minimum concentration (m mol/L) needed to precipitate a given sol. 100 ml each of two sols of AgI, one obtained by adding AgNO_(3) to slight excess of KI and another obtained by adding KI to slight excess of AgNO_(3) , are mixed together. Then :

ALLEN-SURFACE CHEMISTRY -ASSERTION & REASO
  1. A freshly prepared Fe(OH)(3) precipitate is peptized by adding FeCl(3)...

    Text Solution

    |

  2. Assertion :- Langmuir adsorption is a single layer phenomenon. Reaso...

    Text Solution

    |

  3. Assertion :- A sol of As(2)S(3) prepared by the action of H(2)S on As(...

    Text Solution

    |

  4. Assertion(A): Physical adsorption of molecules on the surface requires...

    Text Solution

    |

  5. Assertion :- Filtration of colloidal particles is not possible by filt...

    Text Solution

    |

  6. Assertion :- A gas mixed with another gas forms a colloidal solution. ...

    Text Solution

    |

  7. Assertion :- Lyophilic sol is more stable than lyophobic sol. Reaso...

    Text Solution

    |

  8. Assertion :- Associated colloids are formed by aggregation of large no...

    Text Solution

    |

  9. Assertion :- In case of chemical adsorption, (x)/(m) first increase th...

    Text Solution

    |

  10. Assertion :- Physical adsorption forms multimolecular layer. Reason ...

    Text Solution

    |

  11. Assertion :- The graphical representation of physical adsorption with ...

    Text Solution

    |

  12. Assertion :- Zeolite is shape selective catalyst. Reason :- Size of ...

    Text Solution

    |

  13. Assertion :- Lyophilic sol coagulate by adding other solvent. Reason...

    Text Solution

    |

  14. Assertion :- Catalyst is more effective in powdered form. Reason :- ...

    Text Solution

    |

  15. Assertion :- Amount of charge on hydrophobic sol is greater than hydro...

    Text Solution

    |

  16. Assertion :- During physical adsorption multimolecular layers are form...

    Text Solution

    |

  17. Assertion: A quious gold colloidal solution is red in colour. Reason...

    Text Solution

    |

  18. Assertion: Alcohols are dehydrated to hydrocarbons in the presence of ...

    Text Solution

    |

  19. Assertion(A): The micelle formed by sodiumm stearate in water has -COO...

    Text Solution

    |

  20. Assertion: Reaction of SO(2) and H(2)S in the presence of Fe(2)O(3) ca...

    Text Solution

    |

  21. Assertion: Fe^(3+) can be used for coagulation of As(2)S(3) sol. Rea...

    Text Solution

    |