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^(-)`

B

`Fe^(3+)`

C

`OH^(-)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Preferential adsorption of `Fe^(3+)` takes plaec so positive charge develop
Promotional Banner

Topper's Solved these Questions

  • STOICHIOMETRY AND BALANCING REDOX REACTION

    FIITJEE|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|5 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    FIITJEE|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|5 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 :

FIITJEE-TEST PAPERS-CHEMISTRY
  1. The cell Pt|H(2)(g,01 bar) |H^(+)(aq),pH=x||Cl^(-)(1M)|Hg(2)Cl(2)|Hg|P...

    Text Solution

    |

  2. For a reversible adiabatic ideal gas expansion (dp)/(p) is equal to

    Text Solution

    |

  3. A freshly prepared Fe(OH)(3) precipitate is peptized by adding FeCl(3)...

    Text Solution

    |

  4. Consider the following apparatus. Calculate the partical pressure of H...

    Text Solution

    |

  5. On adding Kl to a metal salt solution, no precipitate was observed but...

    Text Solution

    |

  6. Which of the following is true in respect of chemical adsorption?

    Text Solution

    |

  7. Hydrazine reacts with KIO(3) in presence of HCl as : N(2)H(4)+IO(3)^...

    Text Solution

    |

  8. Which of the following statement is false?

    Text Solution

    |

  9. Consider the following reaction: H(2)O(l)toH(2)O(g)" "DeltaH(1)=44...

    Text Solution

    |

  10. Smog is essentially caused by the presence of

    Text Solution

    |

  11. Which of the following is not tranquilizer?

    Text Solution

    |

  12. Which of the following will not be oxidised by O(3)?

    Text Solution

    |

  13. Which of the following process is used in the extractive metallurgy of...

    Text Solution

    |

  14. Which of the following compound is not an actacid?

    Text Solution

    |

  15. The gas leaked from a stronge tank of the Union Carbide plant in Bhopa...

    Text Solution

    |

  16. 36 mL of pure water takes 100 sec to evaporate from a vessel when a he...

    Text Solution

    |

  17. 108 g fairly concentrated solution of AgNO(3) is electrolysed by using...

    Text Solution

    |

  18. The geometry, hybridization and magnetic moment of [Ni(CO)(4)] are …. ...

    Text Solution

    |

  19. X=amount of gas adsorbed P=Pressure T=Temperature L=Physisorptio...

    Text Solution

    |

  20. The correct statement regarding the third orbit of hydrgen atom is

    Text Solution

    |