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

A colloidal solution is subjected to an electrical field. The particles move towards anode. The coagulation of same sol is studied using NaCl, `BaCl_2` and `AIC_3` solutions. Their coagulating power should be

A

`Na_3PO_4`

B

`Na_2SO_4`

C

`NaCl`

D

Same for all

Text Solution

Verified by Experts

The correct Answer is:
C, D
The sol particles migrate towards cathode. So they are positively charged hence anions would be effective in coagulation greater is the valence of effective ion smaller will be its coagulating value.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise PRACTICE SHEET - 1 (LINKED COMPREHENSION TYPE QUESTIONS)|6 Videos

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise PRACTICE SHEET - 1 (MATCH THE FOLLOWING QUESTIONS)|2 Videos

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise LEVEL - II (LECTURE SHEET) (EXERCISE - IV)(INTEGER ANSWER TYPE QUESTIONS)|4 Videos

  • STOICHIOMETRY

    AAKASH SERIES|Exercise PRACTICE SHEET (ADVANCED) (INTEGER TYPE QUESTION)|2 Videos

  • VA GROUP ELEMENTS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|51 Videos

Similar Questions

Explore conceptually related problems

0.1 M AlCl_3 solution is more effective than 0.1M NaCl solution in coagulating arsenious sulphide sol while 0.1 M AlCl_3 , is less effect than 0.1M Na_3 PO_4 , solutions in coagulating ferric oxide sol. Why?

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As_(2)S_(3) are given : I. (NaCl) = 52 II. (BaCl_(2)) = 0.69 " " III. (MgSO_(4)) = 0.22 Correct order of their coagulating power is

Knowledge Check

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

    A
    `NaClgt BaCl_(2)gtAlCl_(3)`
    B
    `BaCl_(2)gtAlCl_(3)gtNaCl`
    C
    `AlCl_(3)gtBaCl_(2)gtNaCl`
    D
    `BaCl_(2)gtNaClgtAlCl_(3)`

  • Coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separate from the continuous phase. The minimum concentration of an electrolyte in milli-moles per litre of the electrolyte solution which is required to cause the coagulation of colloidal sol is called coagulation value. Therefore higher is the coagulating power of effective ion, smaller will be the coagulation value. Coagulation value of the electrolyte alpha 1/("coagulating power") The coagualtion value of different electrolytes are different. This behaviour can be easily understood by hardy-schulze rule which states. "The greater is the valency of the effective ion greater is its precipitating power." The coagulation of colloidal particles of the sol can be caused by :

    A
    Heating
    B
    Adding electrolyte
    C
    Adding oppsitely charged sol
    D
    All of these

  • Coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separate from the continuous phase. The minimum concentration of an electrolyte in milli-moles per litre of the electrolyte solution which is required to cause the coagulation of colloidal sol is called coagulation value. Therefore higher is the coagulating power of effective ion, smaller will be the coagulation value. Coagulation value of the electrolyte alpha 1/("coagulating power") The coagualtion value of different electrolytes are different. This behaviour can be easily understood by hardy-schulze rule which states. "The greater is the valency of the effective ion greater is its precipitating power." As_2S_3 sol is negatively charged, capacity to precipitate it is highest in which ion ?

    A
    `K_2SO_4`
    B
    `Na_3PO_4`
    C
    `AlCl_3`
    D
    `CaCl_2`

    • Similar Questions

    Explore conceptually related problems

    The order of coagulating power of PO_(4)^(3-), SO_(4)^(2-) and Cl^(-) in the coagulating of a given positive sol is

    In the coagulation of a positive sol, flocculation powers of CI^- , SO_4^(-2) and PO_4^(-3) are in the order

    The concentration of electrolyte required to coagulate a given amount of As_(2)S_(3) solution is minimum in case of

    In the coagulating of a positive sol, flocculation powers of Cl^(-), SO_(4)^(-2) and PO_(4)^(-3) are in the order

    Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. 0.025g of starch sol is required to prevent coagulation of 10ml gold sol when ImL of 10% Nacl solution is present. What is gold number of starch sol

    Home
    Profile