Home/MDCAT/MDCAT Physics Atomic spectra Test Online

MDCAT Physics Atomic spectra Test Online

Mustansar KhanLast Updated: May 26, 2025

Physics Atomic spectra MCQS Online Test

MDCAT Physics Atomic spectra Chapter Online Test

Total Questions:	48
Time Allowed:	25 Minutes
Total Marks:	48
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Physics Online Test Interview Questions about Physics All Universities Entrance Test Recruitments Tests

Please wait...

Page 1 of 2

Uncategorized

1. An atom emits radiation when:

An electron moves to a lower energy level

A neutron leaves the nucleus

A proton is emitted

An electron moves to a higher energy level

2. Which transition emits visible light in the Balmer series?

n = 4 to n = 3

n = 3 to n = 2

n = 1 to n = 2

n = 2 to n = 1

3. When an atom absorbs energy:

Electrons fall to lower levels

It turns into another element

Electrons move to higher levels

A proton leaves the nucleus

4. Which of the following is a unique fingerprint of an element?

Mass number

Atomic radius

Atomic spectrum

Atomic number

5. The frequency of light emitted during an electron transition is related to:

Energy difference between levels

Velocity of atom

Type of nucleus

Atomic mass

6. Which transition emits the highest energy photon in hydrogen?

n = 3 to n = 2

n = ∞ to n = 1

n = 2 to n = 1

n = 4 to n = 2

7. Who first explained the line spectrum of hydrogen?

Newton

Bohr

Maxwell

Einstein

8. The intensity of spectral lines depends on:

Charge of the proton

Number of electrons making the transition

Mass of the nucleus

Energy level spacing

9. Which series has the longest wavelength in the hydrogen spectrum?

Balmer

Lyman

Pfund

Paschen

10. As electron energy levels increase, their spacing:

Becomes infinite

Increases

Decreases

Remains the same

11. Which spectral series corresponds to transitions ending at n = 3?

Paschen

Pfund

Balmer

Lyman

12. What determines the color of light emitted in the line spectrum?

Mass of nucleus

Size of atom

Frequency of emitted photon

Speed of electron

13. In atomic spectra, the lines are:

Sharp and distinct

Blurred

Continuous

Circular

14. Which transition produces ultraviolet radiation in hydrogen?

n = 5 to n = 4

n = 3 to n = 2

n = 2 to n = 1

n = 4 to n = 3

15. Spectral lines are sharp because:

Energy levels are discrete

Wavelength is infinite

Atoms move slowly

Electron speed is fixed

16. The number of lines in hydrogen spectrum is determined by:

Number of neutrons

Atomic weight

Number of protons

Number of allowed transitions

17. What is meant by excitation of an atom?

Addition of neutron

Removal of proton

Electron remains in ground state

Electron jumps to higher energy level

18. What is the cause of different lines in the atomic spectrum?

Nuclear vibrations

Different electronic transitions

Different pressures

Different temperatures

19. The emission spectrum is produced when:

Electrons move to higher levels

Electrons absorb energy

Neutrons are emitted

Electrons return to lower energy levels

20. The Rydberg constant is used in:

Newton’s law of gravitation

Bohr’s atomic model

Einstein’s mass-energy relation

Maxwell’s equations

21. The discrete nature of atomic spectra supports the idea that:

Electrons occupy specific energy levels

Atoms are neutral

Electrons behave like waves

Protons move in orbits

22. What is a line absorption spectrum?

A blurred continuous spectrum

Colored background with bright lines

Dark lines on bright background

Infrared spectrum

23. The spectrum consisting of discrete bright lines is called:

Absorption spectrum

Line emission spectrum

Continuous spectrum

Band spectrum

24. What causes the formation of atomic line spectra?

Vibrating atoms

Molecular bonding

Electron transitions between energy levels

Nuclear reaction

25. The continuous spectrum is produced by:

Single atoms

Low-pressure gases

Cold gases

Solids and dense gases

Page 2 of 2

26. What does each line in an atomic spectrum represent?

A continuous wave

Vibration of nucleus

A photon emitted or absorbed during electron transition

A photon with variable energy

27. What is the effect of increasing atomic number on spectral lines?

All lines are in ultraviolet region

Lines become more complex

No effect

Spectral lines vanish

28. The wavelength of spectral lines in hydrogen can be calculated using:

Wien’s Law

Einstein’s equation

Newton’s equations

Rydberg formula

29. Atomic spectra provide evidence for:

Discrete energy levels in atoms

Constant electron speed

Nuclear energy levels

Continuous energy transfer

30. Why are spectral lines of hydrogen well-defined?

Hydrogen has a large atomic mass

Hydrogen has only one electron

Hydrogen emits gamma rays

Hydrogen has only one proton

31. Which region of the spectrum corresponds to the Brackett series?

Visible

Ultraviolet

Microwave

Infrared

32. The energy of the emitted photon depends on:

Number of protons

Difference between energy levels

Mass of atom

Speed of the atom

33. Which transition corresponds to the highest frequency photon?

n = 4 to n = 2

n = 3 to n = 2

n = 5 to n = 2

n = 2 to n = 1

34. What is the ground state of an atom?

Lowest energy level of the electron

Ionized state

State of maximum kinetic energy

Highest energy level

35. The Lyman series appears in which region of the spectrum?

X-ray

Visible

Ultraviolet

Infrared

36. Emission spectra result from:

Electron transitions from higher to lower energy levels

Neutron decay

Heating solids

Accelerating electrons

37. The first line of the Balmer series is produced by transition from:

n = 4 to n = 2

n = 5 to n = 2

n = 3 to n = 2

n = 2 to n = 1

38. Which statement is true about atomic spectra?

All atoms have the same spectrum

Atoms do not emit light

Each element has a unique line spectrum

Atomic spectra are continuous

39. In the Bohr model, electrons revolve in:

Random orbits

Magnetic loops

Circular quantized orbits

Spiral paths

40. The wavelength of light emitted during an electronic transition depends on:

Temperature

Distance of the nucleus

Energy difference between levels

Speed of atom

41. Which type of spectrum is produced when white light passes through a cool gas?

Absorption spectrum

Line spectrum

Emission spectrum

Continuous spectrum

42. What is the source of the hydrogen emission spectrum?

Vibrating protons

Rotating nucleus

Transitions of electrons between energy levels

Movement of neutrons

43. The spectral lines of hydrogen are explained using:

Classical mechanics

Newton’s laws

Bohr’s postulates

Maxwell’s equations

44. Which series of lines in hydrogen spectrum lies in the visible region?

Paschen series

Lyman series

Brackett series

Balmer series

45. Which element's spectrum did Bohr's theory explain most successfully?

Hydrogen

Helium

Sodium

Lithium

46. What is the unit of Rydberg constant?

s⁻¹

m⁻¹

m²

47. Bohr’s theory could not explain:

Hydrogen spectrum

Stability of atom

Zeeman effect and fine structure

Electron charge

48. The hydrogen spectral series in the far-infrared region is:

Balmer

Pfund

Paschen

Brackett

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

NUMS MDCAT Entry Test 2025 Online Preparation…
Gomal Medical College GMC D.I Khan 2025 Entry Test…
All Pakistani Medical Colleges PMC MDCAT Test Result…
Rawalpindi Medical College RMC 2025 Entry Test…
Shaikh Zayed Medical College SZMC 2025 Entry Test…
Sindh Medical Universities MDCAT Test Result 2025…
Medical College MDCAT Test Result 2025 and Answer Key Online
Khyber Medical University KMU 2025 Entry Test…

MDCAT Test Schedule 2025 Dates Announced
PMDC MDCAT Registration Online 2025 Last Date
MDCAT Physics Vactors And Equilibrium Online Test
MDCAT Fundamental Concepts of Chemistry Test Online MCQs
MDCAT Biology Inheritance Test Online MCQs
MDCAT Biology Acellular life Test Online
MDCAT Biology Variety of Life Test Online MCQs
MDCAT Biology Fields of Specialization Online Test MCQS
MDCAT Biology Kingdom of Protista Online Test MCQS
MDCAT Biology Fungi Online Test MCQS

Mustansar KhanLast Updated: May 26, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

MDCAT Physics Atomic spectra Test Online

Physics Atomic spectra MCQS Online Test

MDCAT Physics Atomic spectra Chapter Online Test

Uncategorized

Related:

You Might Also Like

Mustansar Khan

Leave a Reply Cancel reply