ECAT Chemistry Chapter 5 Atomic Structure Online Test With Answers

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ECAT Chemistry Chapter 5 Atomic Structure Online Test

Sr. # Questions Answers Choice
1 The quantum number which describes the shape of the orbital is Principle quantum number Spin quantum number Azimathal quantum number Magnetic quantum number
2 Balmer's series is in ______ region Visible U V I. R. None
3 The range of visible spectrum is 300 - 600 nm 600 - 900 nm 400 - 750 nm 100 - 300 nm
4 n + l value for 4f will 2 5 7 9
5 Neutrons was discovered by Mosely Milliken Chadwick Ruherford
6 Charge to mass ratio (e/m) of the electron is determined by R. A. Millikan J. J. Thompson G. J, Stoney None of these
7 Cathode rays emitted from cathode are Canal rays Protons Electrons Positrons
8 The value of R (Rydberg's constant) is _______ m-1 1.0974 x 107 1.0842 x 107 1.082 x 10-7 Both a and b
9 Which of the atoms has 1s2, 2s2, 2px22p1y2p1zconfiguration Nitrogen Carbon Fluorine Oxygen
10 Electrons in degenerate orbitals are placed in separate orbitals with same spin according to Hund's rule Pauli exclusion principle Aufbau principle Mosley's law
11 An electron with n = 3 , l = 2 will be in the sub-shell 3p 3d 3f 3s
12 If the value of azimuthal quantum number is 3, then values of m the magnetic quantum no. will be 0, 1, 2, 3 +3, +2, +1, -1, -2, -3 0, -1, -2 ,-3 -3, 0, +3
13 The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is Microwave > infrared > visible > ultraviolet Visible > ultraviolet > microwave > infrared Ultraviolet > visible > infrared > microwave Infrared > microwave > ultraviolet > visible
14 Which have better penetrating power Alpha rays Beta rays Gamma rays X-rays
15 The radiations with wavelength shorter than violet light are called Ultraviolet Infrared Microwave Radio frequency
16 Spectrum of white light is continuous becuase Colors separated by dark spaces There are no boundary lines between the colours The radiations are in infrared region The radiatins fall in ultraviolet region
17 The energy of ionization of an atom is the energy difference between orbital
18 Four d-orbitals contain four lobes while fifth contains only two lobes the orbital is dxy dxz dz<sup>2</sup> dx<sup>2</sup>- y<sup>2</sup>
19 When 6s orbital is complete then next electron goes to 6p 6d 5d 4f
20 The arrangement of subshells in the ascending order of their energy on complete filing of 4f subshell the entering electrons goes to 5s 5p 5d 5f
21 Electrons arranged in orbitals according to the increasing order of their n + l values, this rule is named as Hund's rule Heisenberg's principle Paulit exclusion principle Auf bau principle
22 The degenerate orbitals p-sub shell are 2 3 5 7
23 An orbital can accommodate maximum two electrons with opposite spins according to Heisenberg's principle Aufbau principle Hund's srule Pauli exclusion principle
24 Their e/m, ratio resembles with that of electrons Alpha rays Beta rays Gamma rays X-rays
25 The orbitals having n + l = 5 are 2p, 3d,3s 3p, 3d, 5s 3s, 4p, 4d 5s, 4p, 3d
26 For a 3P subshell the set of principle and azimuthal quantum number is n = 1 , l = 2 n = 3, l = 0 n = 3, l = 1 n = 1, l = 3
27 The total values of magnetic quantum number of subshell are five, the subshell is S-subshell P-subshell D-subshell F-subshell
28 The size of electronic shell is described by Azimuthal Q. no Magnetic Q.No Spin Q. No Principle Q. No
29 Schrodinger wave equation describes electron completely because It describes a set of four quantum number It describes the particle nature of electron It measures wavelength of electron It describes electron moving in specific orbit
30 The value of Plank's constant 'h' is 6.625 x 10<sup>-34</sup> 6.625 x 10<sup>-34</sup>J sec 6.625 x 10<sup>-34</sup>KJ 6.625 x 10<sup>-34</sup>K Cal
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