Home
Class 12
CHEMISTRY
The rate constant of a first order react...

The rate constant of a first order reaction is `60s^(-1)`. How much time it will take to reduce `75%` of its original concentration ?

Text Solution

Verified by Experts

The correct Answer is:
`398.8" min"`
`t_(1//2)=120" min",k=(0.693)/(20)min^(-1),t=(2.303)/(k)log""(a)/(a-0.9a).`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    PRADEEP|Exercise CURIOSITY QUESTION|2 Videos

  • CHEMICAL KINETICS

    PRADEEP|Exercise TEST YOUR GRIP (MULTIPLE CHOICE QUESTIONS)|25 Videos

  • CHEMICAL KINETICS

    PRADEEP|Exercise ADVANCED PROBLEMS FOR COMPETITIONS|14 Videos

  • BIOMOLECULES

    PRADEEP|Exercise IMPORTANT QUESTIONS (FOR BOARD EXAMINATION)|25 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    PRADEEP|Exercise IMPORTANT QUESTION FOR BOARD EXAMINATION|30 Videos
PRADEEP-CHEMICAL KINETICS-PROBLEMS FOR PRACTICE
  1. The thermal decomposition of formic acid (HCOOH) is a first order reac...

    Text Solution

    |

  2. The rate constant of a first order reaction is 60s^(-1). How much time...

    Text Solution

    |

  3. The rate constant of a first order reaction is 60s^(-1). How much time...

    Text Solution

    |

  4. A first order reaction takes 20 minutes for 25% decomposition. Calcula...

    Text Solution

    |

  5. The following data were obtained during the first order thermal decomp...

    Text Solution

    |

  6. The rate constants of a reaction are 1xx10^(-3)sec^(-1)" and "2xx10^(-...

    Text Solution

    |

  7. The rate of a particular reaction quadruples when the temperature chan...

    Text Solution

    |

  8. The rate of a reaction triples when temperature changes from 50 to 100...

    Text Solution

    |

  9. For a reaction, the activation energy is zero. What is the value of ra...

    Text Solution

    |

  10. The activation energy of a first order reaction at 300 K is 60 kJ "mol...

    Text Solution

    |

  11. Given that the temperature coefficient for the saponification of ethyl...

    Text Solution

    |

  12. The activation energy of the reaction is 75.2 kJ mol^(-1) in the absen...

    Text Solution

    |

  13. The rate constants of a reaction at 700 K and 760 K are 0.011" M"^(-1)...

    Text Solution

    |

  14. A 1st order reaction is 50% complete in 30 minutes at 27^(@)C and in 1...

    Text Solution

    |

  15. Nitrogen dioxide (NO(2)) reacts with fluroine (F(2)) to form nitryl fl...

    Text Solution

    |

  16. Express the relationship between the rate of production of water and t...

    Text Solution

    |

  17. For the reaction, 4" NH"(3)(g)+5" O"(2)(g) to 2NO(g) + 6H(2)O(g), if t...

    Text Solution

    |

  18. A reaction 2" X" to "Y "+3Z (e.g., 2NH(3) to N(2)+3H(2)) is being carr...

    Text Solution

    |

  19. A chemical reaction 2A to 4B +C in gas phase occurs in a closed vessel...

    Text Solution

    |

  20. "A "+2" B" to 3" C"+2" D". The rate of disappearance of B is 1xx10^(-2...

    Text Solution

    |