Home
Class 12
CHEMISTRY
In the presence of a catalyst, the heat ...

In the presence of a catalyst, the heat evolved or absorbed during the reaction ___________ .

A

increases

B

decreases

C

remains unchanged.

D

may increase or decrease.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    MODERN PUBLICATION|Exercise EXERCISE|531 Videos

  • BIOMOLECULES

    MODERN PUBLICATION|Exercise EXERCISE|503 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    MODERN PUBLICATION|Exercise EXERCISE|352 Videos

Similar Questions

Explore conceptually related problems

Assertion : The enthalpy of reaction remains constant in the presence of a catalyst. Reason : A catalyst participating in the reaction, forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.

The role of a catalyst in a reversible reaction is to

Translate the following into the language os chemistry: Sulphur dioxide react with oxygen at 450^@C in the presence of a catalyst (V_2O_5) to form sulphur trioxide. The reaction is reversible and 182 KJ of energy is liberated.

At 27^@C in the presence of a catalyst, the activation energy of a reaction is lowered by 10 kJ mol^-1 . The ratio of log k (catalyst)/k (uncatalysed) is

The activation energy of a first order reaction at 300 K is 60 kJ mol^-1 . In the Presence of a Catalyst, the activation energy gets lowered to 50 kJ mol^-1 at 300 K. How many times the reaction rate changes in the Presence of a catalyst at the same temperature ?

Explain the effect of catalyst on the rate of reaction with diagram.

During the process of photosynthesis, light is absorbed by

MODERN PUBLICATION-CHEMICAL KINETICS-EXERCISE
  1. In dilute aqueous H2SO4, the complex diaquodioxalato ferrate (II) is o...

    Text Solution

    |

  2. The role of a catalyst in a chemical reaction is to change:

    Text Solution

    |

  3. In the presence of a catalyst, the heat evolved or absorbed during the...

    Text Solution

    |

  4. The activation energy of a reaction can be determined by

    Text Solution

    |

  5. Consider the following figure and mark the correct option.

    Text Solution

    |

  6. Consider a first order gas phase decomposition reaction given below : ...

    Text Solution

    |

  7. According to Arrhenius equation rate constant k is equal to A e^(-Ea//...

    Text Solution

    |

  8. Consider the Arrhenius equation given below and mark the correct optio...

    Text Solution

    |

  9. A graph of volume of hydrogen released Vs time for the reaction betwee...

    Text Solution

    |

  10. Which of the following statements is not correct about order of a reac...

    Text Solution

    |

  11. Consider the graph given in previous question. Which of the following ...

    Text Solution

    |

  12. Which of the following statements is correct?

    Text Solution

    |

  13. Which of the following graphs represents exothermic reaction?

    Text Solution

    |

  14. Rate law for the reaction A + 2B to C is found to be rate = k [A][B]...

    Text Solution

    |

  15. Which of the following statements is incorrect about the collision the...

    Text Solution

    |

  16. A first order reaction taken 16 minutes for 50% completion. How much t...

    Text Solution

    |

  17. Compounds ‘A’ and ‘B’ react according to the following chemical equati...

    Text Solution

    |

  18. Which of the following statements are not correct regarding rate of ca...

    Text Solution

    |

  19. Define the following terms : Pseudo first order reaction.

    Text Solution

    |

  20. Consider the reaction A harr B. The concentration of both the reactant...

    Text Solution

    |