ECAT Pre Engineering Chemistry Chapter 5 online mcq test with answers for chapter 5 (Atomic Structure)

ECAT Chemistry Chapter 5 Atomic Structure Online Test

Sr. #	Questions	Answers Choice
1	The principle quantum number describes	The distance form the nucleus The shape of the orbital The orientation of the orbital The spin of the electron
2	The wave length of electron as wave is 0.5 nm. What is the wave length in meter	5 x 10<sup>-9</sup> 5 x 10<sup>-12</sup> 5 x 10<sup>-6</sup> 5 x 10<sup>-10</sup>
3	Orbitals having same energy are called	Hybrid orbitals Valence orbitals Degenerate orbitals D-orbitals
4	When 3p orbital is complete, the entering electron goes into	4s 3d 4p 4f
5	In the ground state of an atom, the electron is present	In the nucleus In the second shell Nearest to the nucleus Farthest from the nucleus
6	Quantum number values for 2p orbitals are	n = 2, l = 1 n = 1, l = 2 n = 1, l = 0 n = 2, l = 0
7	The charge of an electron is determined by	J.J. Thomson Crooks Perrin R.A.Millikan
8	Pauli's principle is applicable to	Degenerate orbits Two electrons in the same orbital One electron None
9	The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be	500 nm 500 m 200 nm 5 x 10<sup>7</sup>m
10	The nature of the positive rays depend on	The nature of the electrode The nature of the discharge tube The nature of the residual gas All of the above
11	E = hv is the	Spectral equation Plank's equation de Broglie's equation None of these
12	Splitting of spectral lines when atoms are subjected to strong electron field is called	Zeeman effect Stark effect Photoelectric effect Compton effect
13	The radius of first orbit of hydrogen atom	0.329 A° 0.429 A° 0.529 A° 0.229 A°
14	Which of the following is not charged particle	Proton Electron Neutron Hydrogen nucleus
15	Which of the following is not a sub-atomic particle	Electron Proton Neutron Deuteron
16	Which of the following is not a property of cathode rays	They can produce x-rays when they strike a heavy metal anode They can cause reduction reaction They produce fluorescence in rare earth and minerals They comprise neutral particles

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