Home
Class 12
CHEMISTRY
The concentration of a substance undergo...

The concentration of a substance undergoing a chemical reaction becomes one-half of its original value after time t regardless of the initial concentration. The reaction is an example of a -

A

Zero order reaction

B

First order reaction

C

Second order reaction

D

Third order reaction

Text Solution

Verified by Experts

The correct Answer is:
B
As half life for first order recation is `t_(1//2)=(0.693)/(k)` which is independent of initial concentration of reactant .
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Collision Theory, Energy of Activation and Arrhenius Equation)|54 Videos

  • CHEMICAL KINETICS

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

  • CHEMICAL KINETICS

    ERRORLESS|Exercise Assertion & Reason|6 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

Half-life of a reaction is found to be inversely proportional to the cube of its initial concentration. The order of reaction is

How is half-life period of a initial concentration for a second order reaction ?

For the first order reaction half-life time is ………….. on the initial concentration.

The half-life of a reaction is halved as the initial concentration of the reaction is doubled. The order of the reaction is

For a zero order reaction, the half-life periof is independent of the initial concentration.

For a first order reaction, if ‘a’ is the initial concentration of reactant, then the half life time is

The half-life of a chemical reaction does not change by either increasing or decreasing the initial concentration of reactant. What is the order of the reaction?

In a second ordr reaction, the time needed for the initial concentration of the reactant to reduce or half hat value is :

ERRORLESS-CHEMICAL KINETICS-NCERT BASED QUESTIONS (Rate Law and Rate Constant)
  1. For a first order reaction velocity constant , K = 10^(-3) s^(-1) . Tw...

    Text Solution

    |

  2. The rate law equation for a reaction A rarr B is , r = k[A]^(0) If...

    Text Solution

    |

  3. For a first order reaction, the time required for 99.9% of the reactio...

    Text Solution

    |

  4. Half-life period of a first order reaction is 10 min. Starting with in...

    Text Solution

    |

  5. In a first order reaction , the concentration of the reactant ...

    Text Solution

    |

  6. Half-life of a reaction is found to be inversely proportional to the c...

    Text Solution

    |

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

    Text Solution

    |

  8. For an elementary reaction , X(g)toY(g)+Z(g) the half life period is...

    Text Solution

    |

  9. A reacts to form P , A plot of the reciprocal of the concentration of ...

    Text Solution

    |

  10. The half-life of 2 sample are 0.1 and 0.4 seconds. Their respctive con...

    Text Solution

    |

  11. Half-lives of a first order and a zero order reaction are same. Then t...

    Text Solution

    |

  12. The concentration of a substance undergoing a chemical reaction becom...

    Text Solution

    |

  13. For a first order reaction R to P the rate constant is k . If the init...

    Text Solution

    |

  14. Consider the following reaction: 2NO(2)(g) rarr 2NO(g)+ O(2)(g) In...

    Text Solution

    |

  15. After 2 hours the amount of a certain radioactive substance reduces to...

    Text Solution

    |

  16. In a zero-order reaction, if the initial concentration of the reactant...

    Text Solution

    |

  17. A zero-order reaction, Ararr Product, with an initial concentration [A...

    Text Solution

    |

  18. Among the following graphs showing variation of rate (k) with temperat...

    Text Solution

    |

  19. For a zero-order reaction with rate constant k, the slope of the plot ...

    Text Solution

    |

  20. It takes 1 h for a first order recation to go to 50% completion . The ...

    Text Solution

    |