Home
Class 12
CHEMISTRY
What is meant by positive and negative a...

What is meant by positive and negative adsorptions?

Text Solution

Verified by Experts

Positive adsorption is the phenomenon involving higher concentration of adsorbate on the surface of adsorbent than to concentration of adsorbate in the bulk phase. On the other hand, negative adsorption is the phenomenon involving lesser concentration of adsorbate on the surface of adsorbent as compared to the concentration of adsorbate in the bulk of adsorbent.
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    ICSE|Exercise EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) ( SHORT ANSWER QUESTIONS)|81 Videos

  • SURFACE CHEMISTRY

    ICSE|Exercise EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) ( LONG ANSWER QUESTIONS)|41 Videos

  • SURFACE CHEMISTRY

    ICSE|Exercise EXERCISE (PART-I ( OBJECTIVE QUESTIONS )) (Match the following :)|1 Videos

  • SPECIMEN QUESTION PAPER

    ICSE|Exercise QUESTION|140 Videos

  • THE SOLID STATE

    ICSE|Exercise MULTIPLE CHOICE QUESTIONS (Assertion-Reason based questions)|10 Videos

Similar Questions

Explore conceptually related problems

What is meant by positive and negative deviations from Raoult's law and how is the sign of Delta_("so")H related to positive and negative deviations from Raoult's law ?

Given below is an experimental setup to demonstrate a particular tropic movement in germinating seeds. Study the diagram and answer the questions that follow : What is meant by Positive and negative tropic movements in plants

What is meant by Cry.

What is meant by ramet?

What is meant by humus?

Define work. What is SI unit of work ? What is meant by positive work, negative work and zero work ? Illustrate your answer with two examples of each type.

What is meant by an octave.?

What is meant by heterosis?

What is meant by a substance ?

What is meant by adsorption ?

ICSE-SURFACE CHEMISTRY -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. Why all adsorptions are exothermic in nature ?

    Text Solution

    |

  2. Why heat of chemisorption is more than heat of physisorption?

    Text Solution

    |

  3. What is meant by positive and negative adsorptions?

    Text Solution

    |

  4. Why activated charcoal is a better adsorbent than ordinary charcoal ?

    Text Solution

    |

  5. How will you prove the selective nature of adsorption ?

    Text Solution

    |

  6. How is adsorption of a gas related to its critical temperature?

    Text Solution

    |

  7. Out of the following gases which will be adsorbed more readily on the ...

    Text Solution

    |

  8. Why is ferric chloride preferred over potassium chloride in case of a ...

    Text Solution

    |

  9. What happens when a colloidal sol of Fe(OH)3 is mixed with that of As2...

    Text Solution

    |

  10. What happens when persistent dialysis of a colloidal solution is carri...

    Text Solution

    |

  11. What happens when a beam of light is passed through As2S3 sol?

    Text Solution

    |

  12. KCl is added to Fe(OH)3 sol?

    Text Solution

    |

  13. What is the main cause of charge on a colloidal solution?

    Text Solution

    |

  14. How are gold number and protective power of colloid related?

    Text Solution

    |

  15. What is demulsification ?

    Text Solution

    |

  16. Give four uses of emulsions.

    Text Solution

    |

  17. What are micelles ? Give an example of a micellers system.

    Text Solution

    |

  18. How does soap help in washing clothes?

    Text Solution

    |

  19. What modification can you suggest in the Hardy-Schulze law?

    Text Solution

    |

  20. Why is it essential to wash the precipitate with water before estimati...

    Text Solution

    |