MDCAT Physics Chapter 16 Nuclear Physics Online Test With Answers

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MDCAT Physics Chapter 16 Nuclear Physics Online Test

Sr. # Questions Answers Choice
1 Beta particles have less ionizing power than that of alpha particles because: Their smaller energy Their smaller mass Their smaller density Their smaller charge
2 Beta particles have penetration of about: 100 times more than that of the gamma particles 100 times less than that of an alpha ray 100 times more than that of an alpha ray 10 times more than that of an alpha particle
3 Which row is correct for fission and for fusion? Produces larger nuclei Produces larger nuclei Produces smaller nuclei Produces smaller nuclei
4 The most penetrating radiations out of the following is that of 𝛾-rays β-rays α-particles X-rays
5 During a negative β-decay An atomic electron is ejected A neutron in the nucleus decays emitting an electron An electron which already present within the nucleus is ejected A part of binding energy of nuclei is converted into electron
6 During a negative β-decayv An atomic electron is ejected A neutron in the nucleus decays emitting an electron An electron which already present within the nucleus is ejected A part of binding energy of nuclei is converted into electron
7 When a radioactive nucleus remits a beta particle, the proton neutron ratio: Decreases Increases Remain same None of the above
8 When the radioactive nucleus emits a beta particle, the proton neutron ration: increases by one Remains same Decreases by one Decreases by four
9 The binding energy per nucleon is: Greater for heavy nuclei Least for heavy nuclei Greatest for light nuclei Greatest for medium nuclei
10 The rate of decay radioactive substance: Is constant Decrease exponentially with time Varies inversely with time Decrease linearly with time
11 Three quarks make up a: Leptons Mesons Baryons Quark
12 The particles equal in mass or greater than mass of protons are called: Leptons Mesons Baryons Quarks
13 In nuclear fission reaction, when the products are 140X and 94Sr, the number of neutrons emitted is 1 2 5 9
14 Because of large mass when 𝑎 −paricle enters the atom or molecule it: Moves in zigzag path Moves along straight line Moves along circular path None of these
15 The fusion of hydrogen into helium is more likely to take place: At high temperature and high pressure At high temperature and low pressure At low temperature and low pressure At low temperature and high pressure
16 The more readily fissionable isotope of uranium has an atomic mass of: 220 230 235 240
17 The number of electrons in a nucleus X of atomic number Z and mass number A is: A W Z Y
18 A thorium nucleus is formed when a uranium nucleus emits an 𝑎 −particles. Atomic number of thorium is : 23 60 90 70
19 When a radioactive nucleus emits a 𝖰 −paritcles, the mass number of the atom: Increases by one Decreases by one Remains the same Decreases by four
20 In an 𝑎 −decay: The parent and daughter nuclei have same number of protons The daughter nucleus has one proton more than parent nucleus The daughter nucleus has two protons less than parent nucleus The daughter nucleus has two neutrons more than parent nucleus
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