ECAT Physics Online Test With Answers

image
image
image

ECAT Physics Online Test

Sr. # Questions Answers Choice
1 The energy is found from Einstein's mass energy relation is called binding energy of electron binding energy of proton binding energy of neutron binding energy of nucleus
2 The missing mass which is converted to energy in the formation of nucleus, is called packing fraction mass defect binding energy none of these
3 The energy acquired by a mass of 1g moving with the speed of light is 3 x 10<sup>8</sup>J 9 x 10<sup>13</sup>J 3 x 10<sup>13</sup>J 9 x 10<sup>16</sup>J
4 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be Equal to 1 Less than 1 Greater than 1 Infinity
5 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>-24</sup>kg 1.66 x 10<sup>-27</sup>kg
6 The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called nuclear fission nuclear fusion man defect radioactivity
7 Neon gas have three isotopes whose atomic numbers are 20, 24 , 23 20, 21 , 22 20, 19 , 21 none of these
8 The most abundant isotope of neon is neon-20 neon-21 neon-22 neon-23
9 A mass spectrograph sort out molecules atoms elements isotopes
10 The chemical properties of an element depends upon the number of electron position photons neutrons
11 The chemical properties of all the isotopes of an elements are same different slightly different none of these
12 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called deuterium protium tritium none of these
13 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called deuteron deterium protium tritium
14 How many isotopes of helium are present? 1 2 3 4
15 The number of isotopes of hydrogen are 2 1 3 4
16 Nuclei that have the same charge number but different mass number are called isotones isomers isotopes isobars
17 Electrons are positive charged negatively charged massless neutral
18 Neutrons are positive charge negatively charged massless neutral
19 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
20 Structure of the nucleus was explained by J.J Thomson Bohr Millikan Rutherford
21 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
22 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
23 The number if neutrons in the nucleus of 92U235are Infinite 92 235 143
24 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms A - Z A + Z Z A
25 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is A - Z A + Z Z A
26 The number of all the protons and neutrons in a nucleus is known as atomic number mass number charge number none of these
27 The number of protons inside a nucleus is called mass number atomic weight atomic number none of these
28 The total charge of any nucleus is given as Ze<sup>2</sup> Z<sup>2</sup>e Z/e Ze
29 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
30 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
Download This Set
×