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

Catalyst alters the activation energy of both forward and backward reactions eqully hence heat of reaction remains unchanged.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos
  • CHEMICAL KINETICS

    NCERT FINGERTIPS|Exercise Higher Order Thinking Skills|9 Videos
  • BIOMOLECULES

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos
  • CHEMISTRY IN EVERYDAY LIFE

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 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?

NCERT FINGERTIPS-CHEMICAL KINETICS-NCERT Exemplar
  1. The role of a catalyst is to change

    Text Solution

    |

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

    Text Solution

    |

  3. Activation energy of a chemical reaction can be determined by

    Text Solution

    |

  4. Consider figure and mark the correct option.

    Text Solution

    |

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

    Text Solution

    |

  6. According to Arrhenius equation rate constant k is equal to Ae^(-E(a)/...

    Text Solution

    |

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

    Text Solution

    |

  8. Which of the following statement is not correct about order of a ...

    Text Solution

    |

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

    Text Solution

    |

  10. Consider the graph given in Q.9 Which of the following options does n...

    Text Solution

    |

  11. Which of the following statements is correct?

    Text Solution

    |

  12. Which of the following expression is correct for the rate of reac...

    Text Solution

    |

  13. Which of the following graphs represents exothoermic reaction?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  16. A first order reaction is 50% completed in 1.26 xx 10^(14)s. How much ...

    Text Solution

    |

  17. Compound 'A' and B react according to the following chemical equation....

    Text Solution

    |

  18. Which of the following statements is not correct for the catalyst?

    Text Solution

    |

  19. The value of rate constant of a pseudo first order reaction

    Text Solution

    |

  20. Consider the reaction A to B. The concentration of both the reactan...

    Text Solution

    |