ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 21 Nuclear Physics MCQ`s Test

Sr.#	Question	Answer
1	When certain nucleus emits aβ-particles, is mass number:	A. Remain same B. Increases by one C. Decreases by one D. Decreases by four
2	A curie represents a very strong source of	A. α-particle B. β-particle C. γ-particle D. none of these
3	If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by	A. -4 B. 4 C. 2 D. 1
4	The chemical properties of all the isotopes of an elements are	A. same B. different C. slightly different D. none of these
5	A mass difference of 0.0012 u is equivalent to and energy of:	A. 0.5 Me V B. 1.13 MeV C. 5.13 MeV D. 1.13 keV
6	1 amu is equal to	A. 1.66 x 10^-24kg B. 1.66 x 10^-19kg C. 1.66 x 10^-34kg D. 1.66 x 10^-27kg
7	There is present in paraffin a large amount of:	A. Nitrogen B. Hydrogen C. Carbon D. Baryllium
8	The time required for a radioactive material to decrease in active by one half is called	A. half time B. half life C. disintegration time D. mean life
9	Neutrons are	A. positive charge B. negatively charged C. massless D. neutral
10	Radioactivity is	A. self disruptive activity B. spontaneous activity C. exhibited by all elements under proper conditions D. both 'a' and 'b'