Home
Class 11
CHEMISTRY
If a hospital buys 4 g of pure Co-60 for...

If a hospital buys 4 g of pure Co-60 for therapeutic use, then after 20 years of use the sample of Co-60 will be `(t_(1//2)` for Co-60 =5 years)

A

0.25 g

B

0.50 g

C

0.33 g

D

0.66 g

Text Solution

Verified by Experts

The correct Answer is:
A
In 20 years there are 4 half lives hence amount at the end of 20 years `=(4)/((2)^(2))=0.25 g`
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR AND RADIO CHEMISTRY

    DINESH PUBLICATION|Exercise Revision Questions from Competitive Exams|138 Videos

  • NUCLEAR AND RADIO CHEMISTRY

    DINESH PUBLICATION|Exercise Selected Straight Objected Type MCQs|26 Videos

  • NOMENCLATURE OF ORGANIC COMPOUNDS

    DINESH PUBLICATION|Exercise MCQs|13 Videos

  • ORGANIC CHEMISTRY - SOME BASIC PRINCIPLES & TECHNIOUES

    DINESH PUBLICATION|Exercise PURIFICATION & CHARACTERISATION OF ORGANIC COMPOUNDS|38 Videos

Similar Questions

Explore conceptually related problems

What would be the mean life of ._(27)Co^(60) , if half-life period is 5.3 years?

Using the formula cos 2theta = 2 cos^(2)theta - 1 , find the value of cos 30^(@) , it is being given that cos 60^(@) = 1/2

Find the value of cos20^@. cos40^@. Cos60^@. Cos80^@

What is the amount of "^(60)CO_(27) necessary to provide a radioactive source of 8.0 m Ci strength? The half-life of ^(60)CO_(27) is 5.3 years.

Obtain the amount of ^60Co necessary to provide a radioactive source of 8.0 Ci strength. The half-life of ^60Co is 5.3 years?

The value of decay constant of Co^(60) is 2.5xx 10^(-7)"min"^(-1) . The activity of 2.0 g of the sample is nearly :

Prove that 4 cos theta cos (60^(@) + theta) cos (60^(@) - theta) = cos 3theta .

Co^(60) has half-life of 5.3 years. Find the number of half-lives for 7//8 of the orignal sample to disintergrate.

DINESH PUBLICATION-NUCLEAR AND RADIO CHEMISTRY-Evaluate Yourself
  1. If a hospital buys 4 g of pure Co-60 for therapeutic use, then after 2...

    Text Solution

    |

  2. One among the following set of quantum numbers defines the highest ene...

    Text Solution

    |

  3. If threshold wavelength (lambda(0)) for ejection of electron from meta...

    Text Solution

    |

  4. All elements in the third period have

    Text Solution

    |

  5. One among the following species is planar

    Text Solution

    |

  6. From amongst the following triatomic molecules the least bond angle is...

    Text Solution

    |

  7. The atoms/ion listed in correct order of increasing size are

    Text Solution

    |

  8. The solution of Schrodinger equation for hydrogen leads to three quant...

    Text Solution

    |

  9. In which of the following are all the electrons paired ?

    Text Solution

    |

  10. The diamagnetic molecules from among mole cules of second period eleme...

    Text Solution

    |

  11. Which of the following statements is correct ?

    Text Solution

    |

  12. Amongst phosphorus halides the correct increasing order of bond angle ...

    Text Solution

    |

  13. The State of hybridisation of phosphorus (Z=15) in phosphate ion (PO(4...

    Text Solution

    |

  14. The strength of sigma bond formed by s-s, s-p & p-p overlaps are in th...

    Text Solution

    |

  15. In a crystalline solid, W atoms are at corners, O atoms at edge centre...

    Text Solution

    |

  16. A binary solid, A^(+) B^(-) ( formula mass= 60) has a CsCl structure....

    Text Solution

    |

  17. The molecular orbital shown below is described as

    Text Solution

    |

  18. Which among the following molecules has the largest dipole moment ?

    Text Solution

    |

  19. The difference between DeltaH and Delta E at constant voluem is equal ...

    Text Solution

    |

  20. If the critical frequency (v(0)) for emission of photoelectrons from a...

    Text Solution

    |

  21. The expected wavelength at which the first line of P fund series shall...

    Text Solution

    |