Home
Class 12
CHEMISTRY
Why do we add alum to purify water?...

Why do we add alum to purify water?

Text Solution

Verified by Experts

Alum coagulates colloidal impurities present in water.
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    U-LIKE SERIES|Exercise SHORT ANSWER QUESTIONS|39 Videos

  • SURFACE CHEMISTRY

    U-LIKE SERIES|Exercise LONG ANSWER QUESTIONS-I|76 Videos

  • SURFACE CHEMISTRY

    U-LIKE SERIES|Exercise FILL IN THE BLANKS|8 Videos

  • SOLUTION

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION D)|2 Videos

  • THE D-AND F-BLOCK ELEMENTS

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION A ) MULTIPLE CHOICE QUESTIONS (CHOOSE THE CORRECT OPTION)|7 Videos

Similar Questions

Explore conceptually related problems

Why do we add an inoculum of curd to milk for curdling it

Why do we add an inoculum of curd to milk for curdling it ?

Potash alum is used to purify water.

Why do we add 273 to the temperature while dealing with problems on gas equation?

The alum used for purifying water is

The alum used for purifying water is

U-LIKE SERIES-SURFACE CHEMISTRY-VERY SHORT ANSWER QUESTIONS
  1. The following figure shows the variation of adsorption of N, on charco...

    Text Solution

    |

  2. Gelatin which is a peptide is added in ice-creams. What can be its rol...

    Text Solution

    |

  3. Why do we add alum to purify water?

    Text Solution

    |

  4. Why does bleeding stop by rubbing moist alum?

    Text Solution

    |

  5. What is the role of activated charcoal in gas mask used in coal mines?

    Text Solution

    |

  6. What is the role of adding an electrolyte in peptisation ?

    Text Solution

    |

  7. Of physisorption and chemisorption, which type of adsorption has a hig...

    Text Solution

    |

  8. Explain the following term giving a suitable example : Emulsification.

    Text Solution

    |

  9. What happens when electric field is applied to colloidal solution ?

    Text Solution

    |

  10. Why does the white precipitate of silver halide become coloured in the...

    Text Solution

    |

  11. Why are some medicines more effective in the colloidal form ?

    Text Solution

    |

  12. What causes Brownian movement in colloidal solution ?

    Text Solution

    |

  13. How is Brownian movement responsible for stability of sols ?

    Text Solution

    |

  14. Name a phenomenon associated with surface chemistry.

    Text Solution

    |

  15. Name the species which concentrates at the surface.

    Text Solution

    |

  16. Name one adsorbent.

    Text Solution

    |

  17. Name the process of removing an adsorbed substance from the surface on...

    Text Solution

    |

  18. Both the adsorption and absorption can take place on a surface. What i...

    Text Solution

    |

  19. Is adsorption an exothermic or endothermic phenomenon ?

    Text Solution

    |

  20. Give the name of a kind of adsorption isotherm.

    Text Solution

    |