Self Studies
Self Studies
Self Studies
Self Studies

Atoms and Nucle...

TIME LEFT -
  • Question 1
    4 / -1

    A radioactive isotope X with a half-life of 1.37 × 109 years decays to Y which is stable. A sample of rock from the moon was found to contain both the elements X and Y which were in the ratio of 1 : 7. The age of the rock is

  • Question 2
    4 / -1

    The half life of radium is 1620 years and its atomic weight is 226 kg per kilomol. The number of atoms that will decay from its 1 g sample per second will be
    (Avogadro\'s number N = 6.02 × 1026 atom/kilomol)

  • Question 3
    4 / -1

    The first excited state of hydrogen atom is 10.2 eV above its ground state. The temperature is needed to excite hydrogen atoms to first excited level, is

  • Question 4
    4 / -1

    A small quantity of solution containing Na24 radio nuclide of activity 1 microcurie is injected into the blood of a person. A sample of the blood of volume 1 cm3 taken after 5 hours shows an activity of 296 disintegration per minute. What will be the total volume of the blood in the body of the person. Assume that the radioactive solution mixes uniformly in the blood of the person (Take 1 curie = 3.7 × 1010 disintegration per second and e–λr = 0.7927; where λ = disintegration constant)

  • Question 5
    4 / -1

    A radioactive sample of U238 decays to Pb through a process for which half life is 4.5 × 109 years. The ratio of number of nuclei of Pb to U238 after a time of 1.5 × 109 years (given 21/3 = 1.26)

  • Question 6
    4 / -1

  • Question 7
    4 / -1

    A radioactive nucleus is being produced at a constant rate α per second. Its decay constant is λ. If N0 are the number of nuclei at time t = 0, then maximum number of nuclei possible are

  • Question 8
    4 / -1

    Binding energy per nucleon plot against the mass number for stable nuclei is shown in the figure. Which curve is correct

  • Question 9
    4 / -1

    A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life time of one species is τ and that of the other is 5τ. The decay products in both cases are stable. A plot is made of the total number of radioactive nuclei as a function of time. Which of the following figures best represents the from of this plot

  • Question 10
    4 / -1

    Radioactive element decays to form a stable nuclide, then rate of decay of reactant (dN/dt) will vary with time (t) as shown in figure

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