1. The physical properties of an atom is related to
(A) nucleus
(B) neutron
(C) proton
(D) electron
2. The spontaneous emission of radiations from certain elements is called
(A) half life
(B) radioactivity
(C) isotopes
(D) uranium-235
3. The radioactive elements are
(A) stable
(B) unstable
(C) radioactivity
(D) half life
4. The constructive use of nuclear energy is
(A) hydrogen bombs
(B) nitrogen bomb
(C) treatment of various diseases
(D) atomic bomb
5. Alpha rays carry a charge
(A) neutral
(B) negative
(C) positive
(D) zero
6. Beta rays are actually fast moving
(A) nucleus
(B) proton
(C) electron
(D) neutron
7. Rays have no charge and mass as well
(A) alpha
(B) beta
(C) gamma
(D) no one
8. Rays are more powerful than X-rays
(A) alpha
(B) gamma
(C) beta
(D) no one
9. The disintegration of radioactive elements into their half quantity is called
(A) new life
(B) half life
(C) old life
(D) life less
10. Fission means
(A) to break
(B) to add
(C) to waste
(D) to acquire
11. Fusion means
(A) to break
(B) to acquire
(C) to waste
(D) to add
12. One atom of uranium-235 emits neutron on breaking
(A) 1
(B) 3
(C) 2
(D) 4
13. The transformation of one element into another is only possible in reactions
(A) neutral
(B) fusion
(C) fission
(D) nuclear
14. Half life of radium in years is
(A) 1590
(B) 1490
(C) 1390
(D) 1690
15. The isotope of cobalt is helpful to kill the cancerous cell
(A) Co60
(B) Co59
(C) Co61
(D) Co62
16. The genetic changes in plants and animals are studied with the help of
(A) radioactive isotopes
(B) hydrogen
(C) alpha rays
(D) beta rays
17. The structure and nature of polymers can be determined with the help of
(A) nitrogen
(B) radioactive isotopes
(C) alpha rays
(D) beta rays
18. The half life of C-14 is years
(A) 5577
(B) 5568
(C) 5567
(D) 5569
19. An archaeologist determined the age of Egyptian pyramids
(A) Einstein
(B) Libby
(C) Curie
(D) Goldsmith
20. The age of a dead body or fossil can be determined by
(A) 6C12
(B) 6C13
(C) 6C15
(D) 6C14