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20th Chapter

12th Class Physics Chapter 20 Test

Here you can prepare 12th Class Physics Chapter 20 Atomic Spectra Test. Click the button for 100% free full practice test.

Second Year Physics Chapter 20 Online MCQ Test for 2nd Year Physics Chapter 20 Atomic Spectra Preparation

This online test contains MCQs about following topics:.

- Atomic Spectra - Bohr's Model of the Hydrogen Atom - Inner Shell Transitions and Characteristic X-Rays - Uncertainty Within the Atom - Laser

FSC Part 2 Physics Ch 20 Test
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Second Year Physics Chapter 20 Online MCQ Test for 2nd Year Physics Chapter 20 Atomic Spectra Preparation

Sr. # Questions Answers Choice
1 Balmer series lies in
  • A. Visible region
  • B. Invisible region
  • C. Ultraviolet region
  • D. Infrared region
2 The value of Rydberg constant is
  • A. 1.0974 x 10<sup>7</sup> m<sup>-1</sup>
  • B. 1.0974 x 10<sup>-7</sup> m<sup>-1</sup>
  • C. 1.0974 x 10<sup>6</sup> m<sup>-1</sup>
  • D. 1.0974 x 10<sup>-6</sup> m<sup>-1</sup>
3 The radius of 10th orbit in hydrogen atom is.
  • A. 0.053 nm
  • B. 0.53 nm
  • C. 5.3 nm
  • D. 53 nm
4 Boher proposed his atomic model in:
  • A. 1910
  • B. 1911
  • C. 1912
  • D. 1913
5 Helium Neon Laser Beam emitted from discharge tube has a colour.
  • A. Blue
  • B. Green
  • C. Red
  • D. Black
6 For Holography we use
  • A. X ray
  • B. Laser
  • C. gama rays
  • D. Beta rays
7 Hydrogen atom spectrum does not lie in
  • A. Ultraviolet region
  • B. Visible region
  • C. Infrared region
  • D. X ray region
8 The unit of Rh is.
  • A. ms-1
  • B. m
  • C. m<sup>2</sup>
  • D. m<sup>-1</sup>
9 The following gas was identified in the sun using spectroscopy
  • A. Hydrogen
  • B. Helium
  • C. Carbon
  • D. Nitrogen
10 If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:
  • A. 10.2 eV
  • B. 0 eV
  • C. 3.4 eV
  • D. 6.8 eV

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