Home
Class 12
CHEMISTRY
When freshly precipitated Fe(OH)3 is boi...

When freshly precipitated `Fe(OH)_3` is boiled with water in the presence of few drops of dil HCl, a hydrated ferric oxide sol is obtained. This method is termed 

A

Dialysis

B

Peptization

C

ultrafiltration

D

Electro dispersion

Text Solution

Verified by Experts

The correct Answer is:
B
`Fe(OH)_(3_(s)) overset(FeCl_(("sol")))(rarr)Fe(OH)_(3_(("sol")))`
The process of converting a ppt into colloidal sol by shaking it with D.M in the presence of small amount of electrolyte is called peptisation.
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise LEVEL - II (LECTURE SHEET) (EXERCISE - II)(LINKED COMPREHENSION TYPE QUESTIONS)|5 Videos

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise LEVEL - II (LECTURE SHEET) (EXERCISE - III)(MATCH THE FOLLOWING QUESTIONS)|3 Videos

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise LEVEL - I (EXERCISE - II)(CATALYSIS)|3 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

A basic volatile compound gave a foul smelling gas when treated with CHCl_(3) and alc. KOH. A 0.295 g sample of the substance dissolved in aqueous HCl and treated with NaNO_(3) solution at 0^(@)C liberated a colourless, odourless gas whose volume corresponds to 112 ml at STP. After the evolution of gas was complete, the aqueous solution gave an organic liquid which did not contain nitrogen and on boiling with I_(2) in the presence of alkali gave a yellow precipitate. When the basic volatile compound is reacted with CHCI_(3) and KOH a new compound is formed. This new compound on reduction gives

A basic volatile compound gave a foul smelling gas when treated with CHCl_(3) and alc. KOH. A 0.295 g sample of the substance dissolved in aqueous HCl and treated with NaNO_(3) solution at 0^(@)C liberated a colourless, odourless gas whose volume corresponds to 112 ml at STP. After the evolution of gas was complete, the aqueous solution gave an organic liquid which did not contain nitrogen and on boiling with I_(2) in the presence of alkali gave a yellow precipitate. The molecular weight of the basic volatile compound is

Electrolysis is an important technique for extraction of metals and each low of the solution needs a minimum voltage to get discharged and this value is expressed in terms of discharge potential. For some metal ions the discharge potentials follow the order give below : Li^(+) gt K^(+) gt Ca^(2+) gt Na^(+) gt Mg^(2+) gt Al^(3+) gt Zn^(2+) gt Fe^(2+) gt Ni^(2+) gt H_(3)O^(+) gt Cu^(2+) gt Hg_(2)^(2+) gt Ag^(+) gt Au^(3+) For some anions the discharge potentials are in the order: SO_(4)^(2-) gt NO_(3)^(-) gt OH^(-) gt Br^(-) gt I^(-) A mixture containing chlorides of sodium, calcium and zinc is electrolysed in presence of water The product obtained at cathode will be

Electrolysis is an important technique for extraction of metals and each low of the solution needs a minimum voltage to get discharged and this value is expressed in terms of discharge potential. For some metal ions the discharge potentials follow the order give below : Li^(+) gt K^(+) gt Ca^(2+) gt Na^(+) gt Mg^(2+) gt Al^(3+) gt Zn^(2+) gt Fe^(2+) gt Ni^(2+) gt H_(3)O^(+) gt Cu^(2+) gt Hg_(2)^(2+) gt Ag^(+) gt Au^(3+) For some anions the discharge potentials are in the order: SO_(4)^(2-) gt NO_(3)^(-) gt OH^(-) gt Br^(-) gt I^(-) When aqueous NaCl is electrolysed by using Hg electrode, the product obtained at cathode is

Electrolysis is an important technique for extraction of metals and each low of the solution needs a minimum voltage to get discharged and this value is expressed in terms of discharge potential. For some metal ions the discharge potentials follow the order give below : Li^(+) gt K^(+) gt Ca^(2+) gt Na^(+) gt Mg^(2+) gt Al^(3+) gt Zn^(2+) gt Fe^(2+) gt Ni^(2+) gt H_(3)O^(+) gt Cu^(2+) gt Hg_(2)^(2+) gt Ag^(+) gt Au^(3+) For some anions the discharge potentials are in the order: SO_(4)^(2-) gt NO_(3)^(-) gt OH^(-) gt Br^(-) gt I^(-) When cone. H_(2)SO_(4) is electrolysed with high current density using Pl clectrodes, the product obtained at anodes

Electrolysis is an important technique for extraction of metals and each low of the solution needs a minimum voltage to get discharged and this value is expressed in terms of discharge potential. For some metal ions the discharge potentials follow the order give below : Li^(+) gt K^(+) gt Ca^(2+) gt Na^(+) gt Mg^(2+) gt Al^(3+) gt Zn^(2+) gt Fe^(2+) gt Ni^(2+) gt H_(3)O^(+) gt Cu^(2+) gt Hg_(2)^(2+) gt Ag^(+) gt Au^(3+) For some anions the discharge potentials are in the order: SO_(4)^(2-) gt NO_(3)^(-) gt OH^(-) gt Br^(-) gt I^(-) When aqueous solution of cuprous bromide is electrolysed the product obtained a cathode will be

Sea water contains small quantities of MgCl_(2) and MgS_(4) Sea water is treated with slaked limeto precipitate the dissolved salty as Mg(OH)_(2) The Mg(OH)_(2) is dissolved in a little quantity of HCI and MgCl_(2)6H_(2)O is crystallised from solution. The hydrated MgCl_(2) is heated in a current of dry HCl gas to get anhydrous MgCl_(2) Pused anhydrous MgCl_(2) is subjected to electrolysis. Magnesium deposited at cathode. In the Hanging method magnesia is a reved by using

An organic compound (A) of molecular weight 135 on boiling with NaOH evolves a gas which gives white dense fumes on bringing a rod dipped in HCl near it. The alkaline solution thus obtained on acidification gives the precipitate of a compound (B) having molecular weight 136. Treatment of (A) with HNO_2 also yeilds (B), whereas its treatment with Br_2//KOH gives (C). compound (C) reacts with cold HNO_2 to give(D), which gives red colour with ceric ammonium nitrate. On the other hand(E) an isomer of (A) on boiling with dil HCl gives an acid (F), having molecular weight 136. On oxidation followed by heating, (F) gives an anhydride (G) which condenses with benzene in presence of AlCl_3 to give anthraquinone. IUPAC name of compound (B) is

AAKASH SERIES-SURFACE CHEMISTRY-LEVEL - II (LECTURE SHEET) (EXERCISE - I)(SINGLE & ONE OR MORE THAN ONE CORRECT ANSWERS)
  1. Insecticide sprays are example of

    Text Solution

    |

  2. Bredig's arc method is used for the preparation of colloidal solution ...

    Text Solution

    |

  3. When freshly precipitated Fe(OH)3 is boiled with water in the presence...

    Text Solution

    |

  4. The migration of positively charged colloidal particles, under an elec...

    Text Solution

    |

  5. If a freshly formed ppt of SnO2 is peptised by a small amount of NaOH,...

    Text Solution

    |

  6. On adding AgNO(3) solution to KI solution, a negatively charged colloi...

    Text Solution

    |

  7. Chromatography is a technique based on

    Text Solution

    |

  8. Arsenous sulphide sol is prepared by passing H2S through asenous oxide...

    Text Solution

    |

  9. Tyndall effect observed only when

    Text Solution

    |

  10. When lyophillic sols like starch is placed in electric field the sol p...

    Text Solution

    |

  11. An emulsifier is an agent which

    Text Solution

    |

  12. Oil soluble dye is mixed with water - in - oil emulsion then

    Text Solution

    |

  13. Oil soluble dye is mixed with emulsion and emulsion remains colourless...

    Text Solution

    |

  14. Non - ionogenic surfactants are

    Text Solution

    |

  15. Select correct properties of emulsions

    Text Solution

    |

  16. At CMC

    Text Solution

    |

  17. Above CMC, the surfactant molecules under go

    Text Solution

    |

  18. Which of the following is true in respect of adsorption

    Text Solution

    |

  19. In the adsorption of acetic acid by charcoal which of the following st...

    Text Solution

    |

  20. Calculate the surface area of a catalyst that adsorbs 10^3 cm^3 of N2 ...

    Text Solution

    |