MDCAT XI Chemistry Atomic Structure Online Test-2

1. The chemical and physical properties of protium depend upon:
I. Electron
II. Proton
III. Neutron

2. The fundamental particles discovered through artificial radioactivity are:

3. According to Rutherford’s model, if we focus on the last electron of an element X, the distance between nucleus and electron is --------, and a continuous spectrum of -------- frequency is produced.

4. Identify the correct statements about Rutherford’s model:
I. He said elements have a continuous spectrum.
II. He used classical physics concepts.
III. He said electron shells must be spiral where electrons revolve.

5. When an electron is removed from four different gaseous elements:

6. The Bohr model is applicable for:

7. The spectrum having bright lines on a dark background is called:

8. The spectrum of hydrogen is studied using:

9. The isotope of carbon used in archaeological studies is:

10. The maximum number of electrons in a sub-shell with ℓ = 3 and n = 5 is:

11. Two electrons can have the same values of how many quantum numbers?

12. The azimuthal quantum number defines the:

13. Which law represents the pairing of electrons in a sub-shell after each orbital is filled with one electron?

14. The size and energy of an atomic orbital are associated with:

15. Which of the following orbitals has two lobes?

16. The number of nodal planes in a 3s orbital is:

17. Arrange the following orbitals in decreasing energy order: 4d, 5p, 5f, and 6p.

18. The highest ionization potential belongs to:

19. If an electron has potential energy = P and kinetic energy = K, then its total energy (T) is:

20. When an electron in hydrogen falls back to the second excited state, it falls in which series?

21. Identify the electron moving in the third orbit with dumbbell-shaped orbital and clockwise spin:

22. Who considered the motion of an electron as a wave?

23. The possible number of orbitals in n = 4 is:

24. Which has the better ionizing power?

25. The failure of Bohr’s atomic model is due to his assumption that:

26. The two electrons in lithium differ in which quantum number?

27. When the 3d orbital is filled, the next electron enters into:

28. Which of the following produces positive rays with the minimum charge-to-mass (e/m) ratio?

29. According to Planck’s quantum theory:
I. Energy travels in a discontinuous manner.
II. Energy change occurs in the form of wave packets.
III. Energy of a photon is inversely proportional to its wavelength.
IV. Energy emitted or absorbed is quantized.

30. An orbital cannot contain more than two electrons according to:

31. Degenerate orbitals must have:
I. Same energy
II. Same shape
III. Same lobes

32. Brackett series appears in the hydrogen spectrum if an electron jumps from any higher energy level to the:

33. The atomic orbital is:

34. According to the Aufbau principle, a new electron enters the orbital where:

35. Which of the following is not permissible?

36. Principal, azimuthal, and magnetic quantum numbers are respectively related to:

37. Centrifugal forces in an atom are balanced by:

38. The maximum number of orbitals present in a subshell with azimuthal quantum number ℓ = 3 is:

39. Rutherford bombarded __________ particles in the discovery of the nucleus.

40. Charge of the electron was measured by:

41. Colour produced during fluorescence by cathode rays depends upon:

42. Sodium produces two yellow spectral lines because of:

43. Space around the nucleus where the probability of finding an electron is maximum is called:

44. When a fast-moving electron strikes heavy metal, it produces:

45. Shape of the s orbital is:

46. Which of the following has the maximum penetrating power and is deflected toward the positive pole?

47. If an electron jumps from the 1st to the 3rd orbit, the energy given is:

48. The idea that an atom cannot be divided was proposed by which scientist?

49. What is the maximum number of electrons that can be associated with the quantum numbers:
n = 2, ℓ = 1, m = 0, s = +½?

50. When electrons in hydrogen and Li²⁺ move from the 1st to the 3rd orbit, which has a larger radius, and by how much?