Home
Class 12
CHEMISTRY
A colloidal solution is subjected to an ...

A colloidal solution is subjected to an electrical field. The particle move towards anode. The coagulation of same sol is studied using `NaCl, BaCl_(2)` and `AlCl_(3)` solutions. Their coagulating power should be

A

`NaCl gt BaCl_(2) gt AlCl_(3)`

B

`BaCl_(2) gt AlCl_(3) gt NaCl`

C

`AlCl_(3) gt BaCl_(2) gt NaCl`

D

`BaCl_(2) gt NaCl gt AlCl_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    MOTION|Exercise Exercise - 2 (Level-I)|35 Videos

  • SURFACE CHEMISTRY

    MOTION|Exercise Exercise - 2 (Level-II)|44 Videos

  • SURFACE CHEMISTRY

    MOTION|Exercise DISCUSSION QUESTIONS|10 Videos

  • SOLID STATE

    MOTION|Exercise Exercise - 4 | Level-II|9 Videos

  • THERMOCHEMISTRY

    MOTION|Exercise Exercise - 4 Level-II|8 Videos

Similar Questions

Explore conceptually related problems

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. Under the influence of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using NaCl, Na_(2)SO_(4) and Na_(3)PO_(4) solutions. Their coagulating values will be in the order :

Under the influemce of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using NaCl,Na_(2)SO_(4) , and Na_(3)PO_(4) solutions. Their coagulation values will in the order a. NaClgtNa_(2)SO_(4)gtNa_(3)PO_(4) b. Na_(2)SO_(4)gtNa_(3)PO_(4)gtNaCl c. Na_(3)PO_(4)gtNa_(2)SO_(4)gtNaCl d. Na_(2)SO_(4)gtNaClgtNa_(3)PO_(4)

MOTION-SURFACE CHEMISTRY-Exercise - 1
  1. A metal sulphide sol. can be flucculated by which one of the following...

    Text Solution

    |

  2. Ferric chloride is applied to stop bleeding cut because

    Text Solution

    |

  3. A colloidal solution is subjected to an electrical field. The particle...

    Text Solution

    |

  4. Which of the following methods is used for sol destruction?

    Text Solution

    |

  5. The ability of ion to bring about coagulation of a given collidal solu...

    Text Solution

    |

  6. Flocculation value is expressed in terms of -

    Text Solution

    |

  7. Which of the following has largest protecting power -

    Text Solution

    |

  8. The coagulation of 10cm^(3) of gold sol by 1 ml 10% NaCl solution is c...

    Text Solution

    |

  9. Gelatin protects

    Text Solution

    |

  10. Gold number is minimum in case of……………

    Text Solution

    |

  11. The gold numbers of four protective colloids O,P,Q and R are 0.005, 0....

    Text Solution

    |

  12. Which plot is the adsorption isobar for chemisorption where x is the a...

    Text Solution

    |

  13. For adsorption of gas on solid suface. The plots of logx//m versus log...

    Text Solution

    |

  14. Adsorption is accompanied by

    Text Solution

    |

  15. which gas will be adsorbed on a solid to greater extent ?

    Text Solution

    |

  16. Which of the following factors affects the adsorption of a gas on soli...

    Text Solution

    |

  17. The volume of gases NH(3), CO(2) and CH(4) adsorbed by one gram of cha...

    Text Solution

    |

  18. The heat of physisorption lie in the range of

    Text Solution

    |

  19. which of the following is used to adsorb water ?

    Text Solution

    |

  20. which one of the following is not applicable to chemisorption ?

    Text Solution

    |