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MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
00:00
Question # 1
Balmer series was identified in:
Question # 2
The shell closer to the nucleus is called:
Question # 3
The spectrum emitted from hydrogen filled discharge tube is:
Question # 4
X-ray are also known as
Question # 5
The process of formation of spectrum is called:
Question # 6
Photons must have energy equal to
Question # 7
The first shell near the neucles is
Question # 8
Laser is a beam of:
Question # 9
Graph of Black body radiation is example of
Question # 10
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 11
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 12
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 13
The first series which was identified in the spectrum of hydrogen is called:
Question # 14
Ultraviolet region lies in ______ series
Question # 15
X-rays can penetrate in a solid matte through a distance of several:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Spectrum represents the number of component colours present in certain light in terms of: |
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
|
| 2 | In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them |
A. Small
B. Greater
C. Equal
D. Sometimes
|
| 3 | An electron of the hydrogen atom in the second orbit is called its: |
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
|
| 4 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 5 | An compared to solid matter, a crack or an air bubble allows: |
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
|
| 6 | 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 |
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
|
| 7 | The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the: |
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
|
| 8 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 9 | A metastable stae: |
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
|
| 10 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.