Home
Class 12
CHEMISTRY
Given an example where physisorption cha...

Given an example where physisorption changes to chemisorption with rise in temperature. Explain the reason for change.

Text Solution

Verified by Experts

Adsorrption of `H_(2)` on finely divided nickel at room temperature is due to physisorption. As temperature is increased, `H_(2)` dissociates into atoms which are held on the surface of nikel by chemisorption.
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    PRADEEP|Exercise MATCHING TYPE QUESTINOS|5 Videos

  • SURFACE CHEMISTRY

    PRADEEP|Exercise ASSERTION AND REASON TYPE QUESTIONS|5 Videos

  • SURFACE CHEMISTRY

    PRADEEP|Exercise MULTIPLE CHOICE QUESTIONS-II|11 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    PRADEEP|Exercise Competition (FOCUS) JEE (Main and Advanced)/Medical Entrance SPECIAL (VIII. Assertion-Reason Type Questions)(Type II)|13 Videos

Similar Questions

Explore conceptually related problems

Why do physisorption and chermisorption behave differently with rise in temperature ?

Give reason for the Physisorption decreases with increase in temperature.

How does Young's modulus change with rise in temperature?

Give one example where force changes the shape of an object.

Give one example where force changes the direction of a moving object.

PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS
  1. What causes Brownian motion in colloidal dispersion?

    Text Solution

    |

  2. A colloid is formed by adding FeCl(3) in excess of hot water. What wil...

    Text Solution

    |

  3. How do emulsifiers stabilise emulsion ? Name two emulsifiers.

    Text Solution

    |

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

    Text Solution

    |

  5. Why does leather get hardened after tanning ?

    Text Solution

    |

  6. How does the precipitation of colloidal smoke take place in Cottrell p...

    Text Solution

    |

  7. How will you distiguish between dispersed phase and dispersion medium ...

    Text Solution

    |

  8. On the basis of Hardy-schulze rule explain why the coagulating power o...

    Text Solution

    |

  9. Why does bleeding stop by rubbing moist alum?

    Text Solution

    |

  10. Why is Fe(OH)(3) colloid positively charged when prepared by adding Fe...

    Text Solution

    |

  11. Why do physisorption and chemisorption behave differently with rise in...

    Text Solution

    |

  12. What happens when dialysis is prolonged?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  15. How does a delta form at the meeting place of sea and river water?

    Text Solution

    |

  16. Given an example where physisorption changes to chemisorption with ris...

    Text Solution

    |

  17. Why is desorption important for a substance to act as good catalyst?

    Text Solution

    |

  18. What is the role of diffusion in heterogeneous catalyst?

    Text Solution

    |

  19. How does a solid catalyst enhance the rate of combination of gaseous ...

    Text Solution

    |

  20. Do the vital functions of the body such as digestion get affected duri...

    Text Solution

    |