Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Nuclear Chemist...

TIME LEFT -
  • Question 1
    4 / -1

    A radioactive isotope has a half-life of 27 days. Starting with 4 g of the isotope, what will be mass remaining after 75 days ?

  • Question 2
    4 / -1

    A sample of rock from moon contains equal number of atoms of uranium and lead t1/2 for U = 4.5 × 109 yr. The age of the rock would be

  • Question 3
    4 / -1

    The half-life period of a radioactive material is 15 min. What percent of radioactivity of the material will remain after 45 min ?

  • Question 4
    4 / -1

    84 Rn 219 is a member of actinium series. The other member of this series is

  • Question 5
    4 / -1

    What is the half-life of 6C14, if its disintegration constant is 2.31 × 10-4 yr -1 ?

  • Question 6
    4 / -1

    The activity of a radioactive substance falls to 87.5% of the initial value in 5 yr. What is the half-life of the element ?

  • Question 7
    4 / -1

    A radioactive isotope decays at such a rate that after 192 min only 1/16 of the original amount remains left. Its half-life is

  • Question 8
    4 / -1

    The activity of a radioactive nuclide is 2 × 107 disintegrations per minute (dpm). After 23.03 min, its activity is reduced to 2 × 106 dpm. What is the average life (in min) of this nuclide ?

  • Question 9
    4 / -1

    If the half-life of an isotope X is 10 yr, its decay constant is

  • Question 10
    4 / -1

    A radioactive isotope has a half-life of 10 days. If today 125 mg is left over, what was its original weight 40 days earlier ?

Submit Test
Self Studies
User
Question Analysis

  • Answered - 0

  • Unanswered - 10

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Submit Test
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now