1. What is the atomic number of transuranic elements?
(A) Greater than 92
(B) Greater than 89
(C) Less than 92
(D) Greater than 112
2. Which of the following law obeys radioactive decay?
(A) N = N₀(1 + e⁻ᵗ)
(B) N = N₀e⁻
(C) N = N₀e⁻ᵗ/²
(D) N = N₀e⁻λt
3. Who determined the charge of an electron?
(A) Thomson
(B) Millikan
(C) Maxwell
(D) Ampere
4. How do we identify radioactive materials?
(A) Density
(B) Hardness
(C) Half-life
(D) Mass
5. Cancer is treated by which of the following?
(A) Nickel-63
(B) Carbon-14
(C) Strontium-90
(D) Cobalt-60
6. Which rays are emitted by microwave ovens and TV sets?
(A) Gamma-rays
(B) Alpha-rays
(C) X-rays
(D) None of these
7. In vacuum, ________ is not conserved when pair production cannot take place.
(A) Momentum
(B) Mass
(C) Charge
(D) Energy
8. Where are CFCs used in daily life?
(A) Aerosol spray
(B) Refrigeration
(C) Plastic foam industry
(D) All of the above
9. Which of the following is the most useful tracer?
(A) Sr-90
(B) C-14
(C) None of these
(D) I-131
10. Which device produces high-velocity nuclei?
(A) Mass spectrograph
(B) Wilson cloud chamber
(C) Cloud chamber
(D) Linear accelerator
11. Radiations used for treatment of bones of patients are:
(A) α-rays
(B) β-rays
(C) γ-rays
(D) X-rays
12. Neutron and proton are commonly called:
(A) Boson
(B) Quark
(C) Nucleon
(D) Meson