ECAT Pre Engineering Physics Chapter 20 online mcq test with answers for chapter 20 (Atomic Spectra)

Physics ECAT Pre Engineering Chapter 20 Atomic Spectra Physics Online Test

Sr. #	Questions	Answers Choice
1	The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:	<div>one</div> two three four five
2	Lyman series in the spectrum of hydrogen exists in the :	Infra-red region Visible region Ultraviolet region Both(A) and (B) None of these
3	Tick the series which lie/s in. the infra-red region.	Pfund series Brackett series Paschen series All of these None of these
4	Tick the series which lies in the visible region:	Lyman series Balmer series Paschen series Brackett series P fund series
5	Spectrum represents the number of component colours present in certain light in terms of:	Wavelength Frequency Energy Both (A) and (B) All of these
6	The process of formation of spectrum is called:	Interference Spectroscopy Dispersion Reflection Botha (A) and (D)
7	The results of spectra obtained by Balmer were expressed in 1896 by:	<div>Bohr</div> Rydberg Planck Rutherford Coulomb
8	The natural arrangement of colours in the spectrum of white light spectrum is	VIBGYOR ROYBGIV ROYBIGV BIGROYV None of these
9	Balmer series lies in that region of electromagnetic wave spectrum which is called:	Visible region Invisible region Infra-red region ultraviolet region None of these
10	Balmer series was identified in:	1685 1785 1885 1985 1585
11	The first series which was identified in the spectrum of hydrogen is called:	Lyman series Balmer series Paschen series Brackett series Pfund series
12	The results of spectra obtained by Blamer were expressed in 1896 by	Bohr Rydberg Planck Rutherford Coulomb
13	The range of wavelengths of colurs in the visible colours is	140 nm to 456 nm 10 nm to 56 nm 410 nm to 656 nm 910 nm to 956 nm None of these
14	Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is	Less than atmospheric pressure Much less than atmospheric pressure Greater than atmospheric pressure Much greater than atmospheric pressure Both C and D
15	Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons	Frequency Penetrating power Energy Method of creation

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