Home
Class 12
CHEMISTRY
A radioactive element has a half-life pe...

A radioactive element has a half-life period of `140` days . How much of it will remain after `1120` days

A

`(1)/(32)`

B

`(1)/(250)`

C

`(1)/(512)`

D

`(1)/(128)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS AND RADIOACTIVITY

    FIITJEE|Exercise Assignment problems (Objective) Level-II|21 Videos
  • CHEMICAL KINETICS AND RADIOACTIVITY

    FIITJEE|Exercise Assignment problems (Objective) Level-II (Comprehension-I)|5 Videos
  • CHEMICAL KINETICS AND RADIOACTIVITY

    FIITJEE|Exercise Assignment problems (Subjective) Level-II|15 Videos
  • CHEMICAL EQUILIBRIUM

    FIITJEE|Exercise MATCHING TYPE QUESTIONS|3 Videos
  • CHEMISTRY IN EVERY DAY LIFE

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (OBJECTIVE) Level - II (Numerical Based Questions)|5 Videos

Similar Questions

Explore conceptually related problems

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half-life period 800 yr . After 6400 yr , what amount will remain?

A radioactive material has half-life of 10 days. What fraction of the material would remain after 30 days ?

Initial amount of the radioactive element with half life 10 days is 16 g. What amount in gm of this element will remain after 40 days?

A certain element has half life period of 30 days. Find its average life

A certain radioactive element has half-life of 4 days. The fraction of material that decays in 2 days is

Half life of a radioactive element is 10 days. What percentage of the element will remain undecayed after 100 days?

FIITJEE-CHEMICAL KINETICS AND RADIOACTIVITY-Assignment problems (Objective) Level-I
  1. If a reaction with t(1//2)=69.3 sec, has a rate constant 10^(-2)sec^(-...

    Text Solution

    |

  2. The specific rate constant for a first order reaction is 60xx10^(-4) s...

    Text Solution

    |

  3. The rate constant for a zero order reaction is 2xx10^(-2) mol L^(-1)se...

    Text Solution

    |

  4. A first order reaction is carried out with an initial concentration of...

    Text Solution

    |

  5. What fraction of a rectant showing first order remains after 40min, if...

    Text Solution

    |

  6. A substance undergoes a first order decomposition. The decomposition f...

    Text Solution

    |

  7. A tangent drawn on the curve obtained by plotting concentration of pro...

    Text Solution

    |

  8. For reaction , 3A to products, it is found that the rate of reaction ...

    Text Solution

    |

  9. The thermal decomposition of acetaldehyde , CH(3)CHO to CH(4)+CO, has ...

    Text Solution

    |

  10. The reaction , 2O(3) to 3O(2) , is assigned the following mechanism. ...

    Text Solution

    |

  11. For an endothermic reaction where DeltaH represents the enthalpy of th...

    Text Solution

    |

  12. The rate expression for a reaction is rate =k[A]^(3//2)[B]^(-1), the o...

    Text Solution

    |

  13. The reaction, A(g)+2B(g) to C(g)+D(g) is an elementary process. In an ...

    Text Solution

    |

  14. If concentration are measured in moles/lit and time in minutes, the un...

    Text Solution

    |

  15. A radioactive element has a half-life period of 140 days . How much of...

    Text Solution

    |

  16. For a first order reaction, the plot of log[A](t)vs t is linear with a

    Text Solution

    |

  17. For a hypothetical reaction, A+B to C+D, the rate =k[A]^(-1//2)[B]^(3/...

    Text Solution

    |

  18. In a reaction the threshold energy is equal to

    Text Solution

    |

  19. For a first reaction, t(0.75) is 138.6 seconds. Its specific rate cons...

    Text Solution

    |

  20. At the given point of intersection of the two curves shown concentrati...

    Text Solution

    |