Home
Class 12
PHYSICS
Half-life of a radioactive substance is ...

Half-life of a radioactive substance is `12.5 h` and its mass is `256 g`. After what time the amount of remaining substance is `1g`?

A

`75 h`

B

`100 h`

C

`125 h`

D

`150 h`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NEET 2024

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise QUESTION|50 Videos

  • OPTICS AND OPTICAL INSTRUMENTS

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|87 Videos

Similar Questions

Explore conceptually related problems

Half life of a radioactive elemets is 12.5 hour and its quantity is 256 gm. After how much time is quantity will remain 1 gm ?

Half-life of a radioactive substance is 2.9 days and the amount of substance is 10 mg. How many micrograms of the substance will be left after 29 days.

Half-life of a radioactive substance is 2.9 days. Calculate the amount of 10 mg of substance left after 29 days.

Half life of radioactive substance is 3.20 h. What is the time taken for 75% substance to be used?

Half life of a radioactive substance is 6 minute. If its initial amount is 32g, then amount present after 18 minute is

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:

8 grams of a radioactive substance is reduced to 0.5 g after 1 hour . The t_(1//2) of the radioactive substance is

The half-life of a radioactive substance is 3h and its activity is 1mu Ci . Then the activity after 9h will be (in mu Ci )-

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-NUCLEAR PHYSICS-Exercise
  1. A saample of radioactive elements contains 4xx10^(16) active nuclei. I...

    Text Solution

    |

  2. In compound X(n, alpha) rarr ""(3)Li^(7), the element X is

    Text Solution

    |

  3. Half-life of a radioactive substance is 12.5 h and its mass is 256 g. ...

    Text Solution

    |

  4. Half-life period of a radioactive substance is 6 h. After 24 h activit...

    Text Solution

    |

  5. In nuclear fission process , energy is released because

    Text Solution

    |

  6. m(P) and m(n) are masses of proton and neutron respectively. An elemen...

    Text Solution

    |

  7. Which of the following is positively charged?

    Text Solution

    |

  8. A nuclear decay is expressed as ""(6)C^(11) rarr ""(5)B^(11)+beta^(+...

    Text Solution

    |

  9. The half-life of radioactive material is 3 h. If the initial amount is...

    Text Solution

    |

  10. The relationship between distintegration constant (lambda) and half-li...

    Text Solution

    |

  11. Nuclear fission can be explained by

    Text Solution

    |

  12. After 1 alpha and 2 beta emissions.

    Text Solution

    |

  13. Alpha particles are

    Text Solution

    |

  14. Complete the equation for the following fission process ""92 U^235 ""0...

    Text Solution

    |

  15. A nucleus ""n X^m emits one alpha and one beta particles. The resultin...

    Text Solution

    |

  16. Atomic weight of boron is 10.81 and it has two isotopes ""5 B^10 and "...

    Text Solution

    |

  17. Half-life of a radioactive substance A and B are, respectively, 20 min...

    Text Solution

    |

  18. In a fission reaction ""92^236 U rarr ^117 X + ^117Y + n + n, the bind...

    Text Solution

    |

  19. A free neutron decays into a proton, an electron and

    Text Solution

    |

  20. The satble nucleus that has a radius half that of Fe^(56) is

    Text Solution

    |