Home
Class 12
CHEMISTRY
Why sometimes colloidal precipitate is o...

Why sometimes colloidal precipitate is obtained in group IV? Comment

Text Solution

Verified by Experts

to prevent the colloidal precipitate ammonium chloride must be present in large amount `H_(2)S` should not be passed must be present in large amount `H_(2)S` should not be passed for long.
Promotional Banner

Topper's Solved these Questions

  • QUALITATIVE INORGANIC SALT ANALYSIS

    CENGAGE CHEMISTRY ENGLISH|Exercise Viva Voce Questions And Part-B (Dry Tests)|9 Videos

  • P-BLOCK GROUP 18 ELEMENTS - THE INERT GASES

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 5.1 (Objective)|14 Videos

  • REDUCTION AND OXIDATION REACTION OF ORGANIC COMPOUNDS

    CENGAGE CHEMISTRY ENGLISH|Exercise SUBJECTIVE TYPE|4 Videos

Similar Questions

Explore conceptually related problems

Why sometimes, a black coloured precipitate obtained in group IV even if nickel and cobalt ions are absent?

A yellow precipitate is obtained when:

A white precipitate is obtained when:

Colloidal sulphur is obtained when

Sometimes no precipitate is obtained even if group V radicals are present why ?

Colloidal protein gelatin is obtained by boiling

A red colouration or precipitate is not obtained when:

Explain why : No precipitate is obtained on adding AgNO_3 to chloromethane.

Which colour precipitate is obtained by reaction of phosphate radical with ammonium molybdate

Explain why : A black precipitate is obtained in the Lassaigne's test for the detection of sulphur.

CENGAGE CHEMISTRY ENGLISH-QUALITATIVE INORGANIC SALT ANALYSIS-Viva Voce Questions And Part-C (Analysis Of Cations)
  1. Why are Zn,MnNi,Co not precipitated n the group III as hydroxides?

    Text Solution

    |

  2. Why are the group IV cations not precipitated as sulphides on passing ...

    Text Solution

    |

  3. Why is a brownish ppt. obtained in group II even if iron aluminium and...

    Text Solution

    |

  4. Why sometimes, a black coloured precipitate obtained in group IV even ...

    Text Solution

    |

  5. Why excess of NH(4)OH is used in precipitating the sulphides of group ...

    Text Solution

    |

  6. Why sometimes colloidal precipitate is obtained in group IV? Comment

    Text Solution

    |

  7. Why is NH(4)Cl essential in the precipitation of group V cations?

    Text Solution

    |

  8. Does the excess of NH(4)Cl affect the precipitation of group V cations...

    Text Solution

    |

  9. Why are all aqueous solution of the cobaltous salts pink?

    Text Solution

    |

  10. At times NH(4)OH is added before adding (NH(4))(2)CO(3) to precipitate...

    Text Solution

    |

  11. Na(2)CO(3) cannot be used in place of (NH(4))(2)CO(3) for the precipit...

    Text Solution

    |

  12. Why is CaSO(4) not precipitated on adding ammonium sulphate to a solut...

    Text Solution

    |

  13. At times warming is suggested while precipitating group V cation. Expl...

    Text Solution

    |

  14. Na(2)CO(3) cannot be used in place of (NH(4))(2)CO(3) for the precipit...

    Text Solution

    |

  15. Why do we test group V cations in the order of Ba, Sr, and Ca?

    Text Solution

    |

  16. Why is only acetic acid employed for dissolving the group V ppt.?

    Text Solution

    |

  17. Sometimes no precipitate is obtained even if group V radicals are pres...

    Text Solution

    |

  18. Calcium oxalate is soluble in dilute HCl. Explain.

    Text Solution

    |

  19. Why is a precipitate of magnesium carbonate not fomred along with the ...

    Text Solution

    |

  20. At time a white ppt. is obtained in group VI even in the absence of Mg...

    Text Solution

    |