Which of the following is artificially produced as it does not occur in nature ?

Related Mcqs:

1. Artificially produced radioactive isotopes are used for____________________?

   A. Power generation
   B. Treatment of certain diseases
   C. Initiating nuclear fission and fusion
   D. All A., B. and C.

2. 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

3. Energy produced in the nuclear fission is of the order of _____________ MeV?

   A. 20
   B. 200
   C. 1000
   D. 2000

4. ____________ nuclear reactor does not require a heat exchanger to supply steam to power turbine?

   A. Molten sodium cooled
   B. Helium cooled
   C. Boiling water
   D. Pressurised water

5. A radioactive substance does not emit________________?

   A. α-ray
   B. Proton
   C. Position
   D. β-ray

6. Which of the following radiations is the least penetrating ?

   A. α-rays
   B. β-rays
   C. γ-rays
   D. X-rays

7. Which of the following is not used as a nuclear fuel cladding material ?

   A. Zircaloy
   B. Cadmium
   C. Ceramics
   D. Stainless steel

8. Which of the following nuclear materials is fissile ?

   A. Uranium-238
   B. Thorium-232
   C. Plutonium-239
   D. None of these

9. Which of the following is a moderating material used in nuclear reactor ?

   A. Graphite
   B. Cadmium
   C. Zircaloy (an alloy of zirconium and aluminium)
   D. Stainless steel

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

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