ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

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

Sr.#	Question	Answer
1	The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains	A. 3 more neutrons B. 3 more electrons C. 3 more protons D. 3 more ions
2	The chemical properties of an element depends upon the number of	A. electron B. position C. photons D. neutrons
3	Nucleus of a hydrogen atom may contain:	A. One neutron only B. Two protons and one neutron C. Two protons and two neutrons D. Aany of above
4	The energy is found from Einstein's mass energy relation is called	A. binding energy of electron B. binding energy of proton C. binding energy of neutron D. binding energy of nucleus
5	The number of all the protons and neutrons in a nucleus is known as	A. atomic number B. mass number C. charge number D. none of these
6	Electrons are	A. positive charged B. negatively charged C. massless D. neutral
7	The half lie of radium-226 is	A. 238 years B. 4.5 x 10⁹days C. 1620 years D. 332 years
8	The chemical behaviour of an atom is determined by	A. binding energy B. atomic number C. mass number D. number of isotopes
9	When a nucleus emits an alpha particle, it atomic mass decreased by	A. 2 B. 1 C. 4 D. 3
10	When certain nucleus emits anα particle, its mass number:	A. Increases by one B. Decreases by one C. Remain same D. Decreases by four