Structure of Atom Mock Test – Class 11 Chemistry

1. The charge-to-mass ratio of the electron is written as . This quantity compares

2. A subshell contains how many orbitals?

3. The radial probability distribution curve for a orbital has no radial node because for

4. Assertion: A metal with a larger work function has a higher threshold frequency.
Reason: The threshold relation is , where is constant.

5. A particle has momentum , and its position uncertainty is . Another particle has momentum , and its position uncertainty is . The correct comparison is

6. The pair and represents isotopes because the two atoms have

7. A compact record says:

The corrected configuration and the stability reason are

8. A neutral atom has the configuration . A student says it has unpaired electrons because the last superscript is . The correct number of unpaired electrons is

9. An electron is accelerated through a potential difference of . Using , its de Broglie wavelength is closest to

10. The configuration of , given neutral iron as , is

11. A compact record says that an orbital has , . The total nodes, angular nodes, and radial nodes are respectively

12. The term "nucleons" refers to

13. A proton is best described as a subatomic particle that has

14. A photon of wavelength ejects electrons from a metal with threshold wavelength . Using , the maximum kinetic energy is closest to

15. Assertion: The line spectrum of hydrogen supports the idea of quantized energy levels.
Reason: Each spectral line corresponds to a photon whose energy equals the difference between two allowed electronic levels.

16. The species , , , and are called isoelectronic because they have the same

17. A set of oil droplets in Millikan's experiment gives the following charges in terms of .

The charge entry that is not consistent with charge quantization is

18. Assertion: and are isotopes.
Reason: They have the same number of protons but different numbers of neutrons.

19. A wave diagram is described as follows: Point P and Point Q are two consecutive crests of the same electromagnetic wave. The distance represents

20. Assertion: Most alpha particles passed through the gold foil without appreciable deflection.
Reason: Most of the volume of an atom is empty space.

21. The Rydberg formula for the wave number of a hydrogen spectral line is

22. A wavelength is reported as . Its wave number in is closest to

23. An electron is accelerated through , and another identical electron is accelerated through . If , the ratio of their wavelengths is

24. In Rutherford's model, electrons do not simply fly away from the nucleus because the model assumes an attractive force between

25. The number of radial nodes in a orbital is given by . For , the number of radial nodes is

26. A hydrogen-like ion has one electron and nuclear charge . If its electron moves from to , the energy emitted is how many times the energy emitted for the same transition in hydrogen?

27. Two metals have work functions and . Light of photon energy falls separately on both metals. The maximum kinetic energies from P and Q are respectively

28. The notation is used for a neutron. The superscript mainly represents

29. A simple discharge tube has a glass body, two metal electrodes, gas at low pressure, and a high potential difference. The observation that most directly indicates interaction of rays with the tube wall is

30. Use the arrangement described below: a sealed glass tube contains a gas at low pressure. Two electrodes are fixed at opposite ends, and a high voltage is applied across them. A faint glow appears near the wall after the discharge begins. This arrangement is mainly used to study

31. A natural element has two isotopes: - and -. Its average atomic mass is . The abundance of - is

32. A radiation has wave number . Its wavelength in is closest to

33. Two electromagnetic waves travel in vacuum. Wave P has wavelength , and Wave Q has wavelength . The frequency of P compared with Q is

34. A configuration is not acceptable because

35. The two electrodes in a basic gas discharge tube are connected to a high-voltage source. The electrode connected to the negative terminal is called the

36. A photoelectron has maximum kinetic energy . Taking , the stopping potential is

37. A subatomic particle has relative charge and mass close to . The particle is a

38. The highest charge-to-mass ratio among positive-ray particles is shown by the hydrogen ion because it has

39. A comparison table combines several atomic-structure relations.

The mismatched row is

40. A hydrogen line is produced by transition to . Its wave number is

41. A row in a student's notes says:

The note is

42. The subshell that fills first among and is because

43. A species has protons and electrons. Its charge is

44. A pair of atoms has values and , while their neutron numbers are both . The pair is classified as

45. A table lists wave quantities for electromagnetic radiation.

The mismatched row is

46. Rutherford concluded that the nucleus is much smaller than the atom because

47. An orbital is described as having radial nodes and angular node. The orbital could be

48. The configuration represents a neutral atom. The differentiating electron beyond the core is associated with

49. A species has electrons and nuclear charge . The species is best written as

50. A neutral magnesium atom has configuration . The configuration of is