Related Mcqs:

1. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

   A. 159
   B. 1837
   C. 2537
   D. 10000

2. Neutrons have mass approximately equal to that of _____________ atoms?

   A. Hydrogen
   B. Helium
   C. Deuterium
   D. None of these

3. “Critical mass” is the minimum mass of nuclear fissile material required for the__________________?

   A. Sustainment of chain reaction
   B. Power generation on commercial scale
   C. Economic power generation
   D. None of these

4. “Critical mass” is the minimum mass of nuclear fissile material required for the_______________________?

   A. Sustainment of chain reaction
   B. Power generation on commercial scale
   C. Economic power generation
   D. None of these

5. The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____________________?

   A. Less
   B. More
   C. Same
   D. Much more

6. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is ___________________?

   A. 1
   B. 0.5
   C. 2
   D. 4

7. The atomic mass of an element is fractional, because ______________________?

   A. Of uncertainty principle
   B. It may have isobars
   C. It contains neutrons
   D. It may have isotopes

8. The mass number of an element is not changed, when it emits _______________ radiations?

   A. α & β
   B. β & γ
   C. γ & α
   D. α, β, & γ

9. Energy equivalent to one atomic mass unit (amu) is ______________ MeV?

   A. 9.31
   B. 93.1
   C. 931
   D. 9310

10. The critical mass of a fissionable material can be reduced by__________________?

    A. Heating it
    B. Cooling it
    C. Surrounding it by neutron reflecting material
    D. Surrounding it by neutron absorbing material