Home
Class 12
CHEMISTRY
Chemical reactions with very high E(a) v...

Chemical reactions with very high `E_(a)` values are generally

A

Very fast

B

Very slow

C

Moderately fast

D

Spontaneous

Text Solution

Verified by Experts

The correct Answer is:
B

If the activation energy for a reaction is low, the fraction of effective collisions will be large and the reaction will be fast . On the other hand, if the activation energy is high then fraction of effective collisions will be small and the reaction will be slow .
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Photochemical Reaction)|4 Videos
  • CHEMICAL KINETICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Graphical Questions)|7 Videos
  • CHEMICAL KINETICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Rate Law and Rate Constant)|106 Videos
  • CARBOXYLIC ACIDS

    ERRORLESS|Exercise Assertion & Reason|5 Videos
  • CHEMISTRY IN EVERYDAY LIFE

    ERRORLESS|Exercise Assertion & Reason|4 Videos

Similar Questions

Explore conceptually related problems

The rate constant of a chemical reaction at a very high temperature will approach

The density is very high for

Boiling point is very high for

Melting point is very high for

In general, it is observed that the rate of a chemical reaction doubles with every 10^(@) rise in temperature. If the generalisation holds for a reaction in the temperature range 295 K to 305 K, what would be the value of activation energy for the reaction?

A first order reaction has very high value of activation energy.

ERRORLESS-CHEMICAL KINETICS-NCERT BASED QUESTIONS (Collision Theory, Energy of Activation and Arrhenius Equation)
  1. The activation energy of a reaction is zero. The rate constant of this...

    Text Solution

    |

  2. The rate constant is given by the equation k = P.Ze^(-E//RT). Which fa...

    Text Solution

    |

  3. Chemical reactions with very high E(a) values are generally

    Text Solution

    |

  4. In the given graph the activation energy , E(a) for the reverse reacti...

    Text Solution

    |

  5. If the activation enery for the forward reaction is 150 "kJ mol"^(-1) ...

    Text Solution

    |

  6. The rate constant (K') of one reaction is double of the rate constant ...

    Text Solution

    |

  7. The role of a catalyst is to change

    Text Solution

    |

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

    Text Solution

    |

  9. For a reversible reaction where the forward reaction is exotherminc, w...

    Text Solution

    |

  10. A large increase in the rate of a reaction for a rise in temperature i...

    Text Solution

    |

  11. On increasing the temperature, the rate of the reaction increases beca...

    Text Solution

    |

  12. The minimum energy a molecule should possess in order to enter into a ...

    Text Solution

    |

  13. Activation energy is

    Text Solution

    |

  14. The reason for almost doubling the rate of reaction on increasing the ...

    Text Solution

    |

  15. The activation energy for a reaction at the temperature T K was found ...

    Text Solution

    |

  16. Collision theory is applicable to

    Text Solution

    |

  17. Pick the appropriate choice about collision theory of reaction rates

    Text Solution

    |

  18. The rate of reactions exhibiting negative activation energy

    Text Solution

    |

  19. Why do most chemical reaction rates increase rapidly as the temperatur...

    Text Solution

    |

  20. Which of the following statement is not correc for following straight ...

    Text Solution

    |