Radioactivity of an isotope is expressed in______________________?

Related Mcqs:

1. Unit of radioactivity is_________________?

   A. Barn
   B. Fermi
   C. Angstrom
   D. Curie

2. The phenomenon of radioactivity was discovered by___________________?

   A. Madam Curie
   B. Becquerel
   C. Roentgen
   D. J.J. Thomson

3. Unit of radioactivity is__________________?

   A. Barn
   B. Fermi
   C. Angstrom
   D. Curie

4. The most abundant isotope of natural uranium is ___________________?

   A. 92U238
   B. 92U235
   C. 92U234
   D. None of these

5. If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ____________ days?

   A. 5
   B. 10
   C. 20
   D. 30

6. A radioactive isotope undergoes decay with respect to time following _____________ law?

   A. Logarithmic
   B. Exponential
   C. Linear
   D. Inverse square

7. Which one is the radioactive isotope of hydrogen ?

   A. Deuterium
   B. Ortho-hydrogen
   C. Tritium
   D. None of these

8. Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to___________________?

   A. 10-24 cm2
   B. 10-12 cm
   C. 1 Angstrom
   D. 10-24 cm

9. Which of the following ores contains maximum percentage of uranium ?

   A. Carnotite
   B. Thorium
   C. Rescolite
   D. Pitchblende

10. Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is ______________ kgf/cm2?

    A. 0.2
    B. 7
    C. 35
    D. 50