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

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    GRB PUBLICATION|Exercise Mechanism of Reactions|45 Videos

  • CHEMICAL KINETICS

    GRB PUBLICATION|Exercise compllcatio in first order reactions|17 Videos

  • CHEMICAL KINETICS

    GRB PUBLICATION|Exercise E. Methods to Monitor the Progress of Reaction|43 Videos

  • CHEMICAL BONDING-I

    GRB PUBLICATION|Exercise Subjective Type|120 Videos

  • COORDINATION COMPOUNDS

    GRB PUBLICATION|Exercise SBJECTIVE TYPE|98 Videos

Similar Questions

Explore conceptually related problems

In the presence of a catalyst, the rate of a reaction grows to the extent of 10^(5) times at 298 K . Hence, the catalyst must have lowered E_(a) by

In the presence of catalyst, the activation energy of the reaction is lowered by 2 kcal at 27^(@)C . The rate of reaction will increased by

Why does heat get released // absorbed during chemical reactions?

Assertion: A catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction decreases.

(A) A catalyst increases the rate of areaction. (R)In presence of a catalyst, the activation energy of the reaction increases.

HDP IS Formed in the presence of catalyst

Refer picture given below. (a) Calculate DeltaH for the reaction and the energy of activation for the forward reaction as well as backward reaction. (b) The dotted curve is in the presence of a catalyst. What is the energy of activation for the two reactions in the presence of catalyst? ( c) Will the catalyst change the extent of reaction?

GRB PUBLICATION-CHEMICAL KINETICS-F. Effect of Temperature and Catalyst
  1. Which of the following statements is correct ?

    Text Solution

    |

  2. Which of the following statement is/are correct with respect to Arrhen...

    Text Solution

    |

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

    Text Solution

    |

  4. In gaseous reactions important for the understanding of the upper atom...

    Text Solution

    |

  5. Consider the Arrhenius equation given below and mark the correct op...

    Text Solution

    |

  6. An iron catalyst is used in the Haber process in which process N2 and ...

    Text Solution

    |

  7. Catalyst in a chemical reaction :

    Text Solution

    |

  8. All of the following are expected to affect the rate of an irreversibl...

    Text Solution

    |

  9. A catalyst speeds up a chemical reaction by :

    Text Solution

    |

  10. The activation energy ofr a reaction can be determined by measuring th...

    Text Solution

    |

  11. Most reactions occure more rapidly at high temperatures than at low te...

    Text Solution

    |

  12. Two unimolecular reactions, I and II have the same rate constant at 25...

    Text Solution

    |

  13. 2NO(g) +Cl(2)(g) rarr 2NOCl, DeltaH=-38 KJ If the activation energy ...

    Text Solution

    |

  14. A catalyst affects the rate of a chemical reaction by:

    Text Solution

    |

  15. Which of these factors affect the value of the rate constant for a rea...

    Text Solution

    |

  16. Which of the correct exponential form of the Arrhenius equations?

    Text Solution

    |

  17. The chemical in a lightsticks give off light as they react. When the l...

    Text Solution

    |

  18. The rate of the reaction of chorine gas with a liquid hydrocarbon can ...

    Text Solution

    |

  19. The effect of temperature on the rates of chemical reactions is primar...

    Text Solution

    |

  20. The value of the rate constant for a gas phase reacation can be change...

    Text Solution

    |