Home
Class 12
CHEMISTRY
The half life of radioactive isotope is ...

The half life of radioactive isotope is 3 hour. If the initial mass of isotope were 256 g, the mass of it remaining undecayed after 18 hr is a)12 g b)16 g c)4 g d)8 g

A

`16.0` g

B

`4.0` g

C

`8.0` g

D

`12.0` g

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • RADIOACTIVITY

    MOTION|Exercise EXERCISE - 2|15 Videos

  • RADIOACTIVITY

    MOTION|Exercise EXERCISE - 3|23 Videos

  • RADIOACTIVITY

    MOTION|Exercise EXERCISE - 4 LEVEL - II|20 Videos

  • PERIODIC TABLE

    MOTION|Exercise Exercise - 4 | Level-II|22 Videos

  • S-BLOCK

    MOTION|Exercise EXERCISE - 3 Level - II Previous Year | JEE adv|4 Videos

Similar Questions

Explore conceptually related problems

The half-life of a radioactive isotope is 3 hour. IF the initial mass of isotope were 256g the mass of it remaining undercayed after 18hr is:

The half life of a radioisotope is 1.5 hours is (the initial mass of isotope is 32 g)

The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the undecayed remaining mass after 18 hours would be

The half-life of a radioactive isotope is 3 h. if the initial mass of the isotope was 300 g, the mass which remained undercayed in 18 h would be

MOTION-RADIOACTIVITY -EXERCISE - 1
  1. Two radioactive material A(1) and A(2) have decay constants of 10 lamb...

    Text Solution

    |

  2. The half life of radioactive isotope is 3 hour. If the initial mass of...

    Text Solution

    |

  3. The half-life of a radioisotope is four hours. If the initial mass of ...

    Text Solution

    |

  4. Read the following : (i) The half-life period of a radioactive elem...

    Text Solution

    |

  5. The radioactive sources A and B of half lives of t hr and 2t hr respec...

    Text Solution

    |

  6. The half life of Tc^(99) is 6.0 hr. The delivery of a sample of Tc^(9...

    Text Solution

    |

  7. How many atoms of 0.1 g-atom of a radioacitve isotope .(Z)X^(A) (half ...

    Text Solution

    |

  8. A radioacive element decays by parallel path as given below: A overs...

    Text Solution

    |

  9. Two radioactive nuclides A and B have half-lives 50 min and 10 min res...

    Text Solution

    |

  10. A radioactive sample had an initial activily of 56 dpm (disintegratio...

    Text Solution

    |

  11. The radioactivity of sample is R(1) at a time T(1) and R(2) at a time ...

    Text Solution

    |

  12. .(13)Al^(27) is a stable isotope. .(13)Al^(29) is expected to disinteg...

    Text Solution

    |

  13. Loss of beta-particles is equivalent to

    Text Solution

    |

  14. Which of the following nuclear reactions will generate an isotope ?

    Text Solution

    |

  15. Which of the following processes represents a gamma- decay only ?

    Text Solution

    |

  16. Select correct statment(s):

    Text Solution

    |

  17. Consider the following nuclear reactions : .(92)^(238)M to (Y)^(X)N+...

    Text Solution

    |

  18. A radioactive element gets spilled over the floor of a room. Its half-...

    Text Solution

    |

  19. The analysis of a uranium reveals that ratio of mole of .^(206)Pband ....

    Text Solution

    |

  20. The ratio of C^(14) to C^(12) in a living matter is measured to be (...

    Text Solution

    |