ECAT Pre General Science Physics Chapter 21 Nuclear Physics Online Test With Answers

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics Online Test

Sr. # Questions Answers Choice
1 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called deuterium protium tritium none of these
2 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called deuteron deterium protium tritium
3 How many isotopes of helium are present? 1 2 3 4
4 The number of isotopes of hydrogen are 2 1 3 4
5 Nuclei that have the same charge number but different mass number are called isotones isomers isotopes isobars
6 Electrons are positive charged negatively charged massless neutral
7 Neutrons are positive charge negatively charged massless neutral
8 The diameter of an atom is of the order 10<sup>-125</sup>m 10<sup>-11</sup>m 10<sup>-10</sup>m 10<sup>-9</sup>m
9 Structure of the nucleus was explained by J.J Thomson Bohr Millikan Rutherford
10 Charge on proton is 1.59 x 10<sup>-9</sup>C 1.59 x 10<sup>-7</sup>C -1.59 x 10<sup>-19 </sup>C 1.59 x 10<sup>-19</sup>C
11 Mass of proton is of order of 10<sup>-31</sup>gm 10<sup>-27</sup>kg 10<sup>-24</sup>gm 10<sup>+27</sup>kg
12 The number if neutrons in the nucleus of 92U235are Infinite 92 235 143
13 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms A - Z A + Z Z A
14 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is A - Z A + Z Z A
15 The number of all the protons and neutrons in a nucleus is known as atomic number mass number charge number none of these
16 The number of protons inside a nucleus is called mass number atomic weight atomic number none of these
17 The total charge of any nucleus is given as Ze<sup>2</sup> Z<sup>2</sup>e Z/e Ze
18 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains 3 more neutrons 3 more electrons 3 more protons 3 more ions
19 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is A - Z A Z A + Z
20 According to Rutherford atomic model, the positive charge in an atom is concentrated at its centre is in the form of positive electron at same distance from its centre is spread uniformly through its volume none of these
21 The chemical behaviour of an atom is determined by binding energy atomic number mass number number of isotopes
22 1 amu is equal to 1.66 x 10<sup>-24</sup>kg 1.66 x 10<sup>-19</sup>kg 1.66 x 10<sup>-34</sup>kg 1.66 x 10<sup>-27</sup>kg
23 Mass of proton is 1.67 x 10<sup>-27</sup>kg 1.67 x 10<sup>-31</sup>kg 1.66 x 10<sup>-34</sup>kg 1.67 x 10<sup>-17</sup>kg
24 Mass of neutron is 1.67 x 10<sup>-31</sup>kg 1.67 x 10<sup>-27</sup>kg 9.1 x 10<sup>-31</sup>kg 1.67 x 10<sup>-</sup>19kg
25 Nucleus consists of proton and neutron protons and electron electron and neutron protons only
26 A particle having the mass of electron and charge of a proton is called a photon position antiproton antineutrino
27 Charge on neutron is 1.6 x 10<sup>-19</sup>C zero -1.6 x 10<sup>-19</sup>C 1.2 x 10<sup>-19</sup>C
28 In 1932 Chadwick discovered proton neutron photon electron
29 Neutron was discovered by Curie Roentgen Chadwick Rutherford
30 Neutron was discovered in 1915 1920 1925 1932
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