MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The n+l value of 6d orbital is |
| A. | 8 |
| B. | 7 |
| C. | 6 |
| D. | 9 |
| Answer» B. 7 | |
| 2. |
Upward velocity of electron is directly proportional to |
| A. | mg |
| B. | Ee-mg |
| C. | Ee |
| D. | Ee+mg |
| Answer» C. Ee | |
| 3. |
Planck's constant is represented by |
| A. | d |
| B. | e |
| C. | f |
| D. | h |
| Answer» E. | |
| 4. |
After Bohr atomic model the series of spectral line of hydrogen atom discovered was |
| A. | Balmer series |
| B. | Pfund series |
| C. | Lyman series |
| D. | Brackett series |
| Answer» C. Lyman series | |
| 5. |
Beam of alpha particles in Rutherford's experiment was produced from hole in |
| A. | titanium |
| B. | lead |
| C. | tungsten |
| D. | silver |
| Answer» C. tungsten | |
| 6. |
Another scientist with Davison to show dual nature of matter was |
| A. | Rutherford |
| B. | Bohr |
| C. | Germer |
| D. | de Broglie |
| Answer» D. de Broglie | |
| 7. |
The value of energy of electron -145.92 in kilo joule per mole is for |
| A. | first orbit of hydrogen |
| B. | second orbit of hydrogen |
| C. | third orbit of hydrogen |
| D. | fourth orbit of hydrogen |
| Answer» D. fourth orbit of hydrogen | |
| 8. |
Spectral lines has wavelength and wave number which depends upon |
| A. | Quantity of energy emitted by electron |
| B. | quantity of electrons |
| C. | quantity of light |
| D. | quantity of atoms |
| Answer» B. quantity of electrons | |
| 9. |
The neutrons which are used for fission purposes are |
| A. | slow neutrons |
| B. | fast neutrons |
| C. | moderate neutrons |
| D. | none |
| Answer» B. fast neutrons | |
| 10. |
The n+l value of 1s orbital is |
| A. | 1 |
| B. | 5 |
| C. | 3 |
| D. | 4 |
| Answer» B. 5 | |
| 11. |
1 Cycle per second is equal to |
| A. | decibels |
| B. | Hz |
| C. | per second |
| D. | none |
| Answer» C. per second | |
| 12. |
The charge on the oil droplet is actually charge on |
| A. | one electron |
| B. | two protons |
| C. | neutrons |
| D. | none |
| Answer» B. two protons | |
| 13. |
For derivation of radius the charge on nucleus is assumed to be |
| A. | Ze+ |
| B. | Fe+ |
| C. | Ne+ |
| D. | Ze- |
| Answer» B. Fe+ | |
| 14. |
Electron was the name which was given by |
| A. | Thomson |
| B. | Stoney |
| C. | Edward |
| D. | Addison |
| Answer» C. Edward | |
| 15. |
The letter 'p' for azimuthal quantum number represents |
| A. | principal |
| B. | postal |
| C. | principle |
| D. | none |
| Answer» B. postal | |
| 16. |
The value of the droplet moving upward and that moving downward is recorded by |
| A. | machine |
| B. | microscope |
| C. | atomizer |
| D. | chromatogram |
| Answer» C. atomizer | |
| 17. |
The potential energy of the electron system is zero at |
| A. | near nucleus |
| B. | first orbit |
| C. | last orbit |
| D. | infinity |
| Answer» E. | |
| 18. |
The element volatilized for continuous spectrum effect the |
| A. | number of lines of spectrum |
| B. | continuity of spectrum |
| C. | thickness |
| D. | color |
| Answer» B. continuity of spectrum | |
| 19. |
The discovery of neutron was done in the year |
| A. | 1970 |
| B. | 1932 |
| C. | 1980 |
| D. | 1990 |
| Answer» C. 1980 | |
| 20. |
The lines which shows the spectrum of hydrogen atom are |
| A. | combined |
| B. | attached |
| C. | perpendicular |
| D. | isolated |
| Answer» E. | |
| 21. |
The spectrum of rays having lower wavelength has |
| A. | small energies |
| B. | high energies |
| C. | moderate energies |
| D. | very small energies |
| Answer» C. moderate energies | |
| 22. |
When alpha particle from nitrogen is ejected the atom reduced is |
| A. | Boron |
| B. | nitrogen |
| C. | Sulphur |
| D. | carbon |
| Answer» B. nitrogen | |
| 23. |
Moseley law helped us to discover |
| A. | Pr |
| B. | Tc |
| C. | potassium |
| D. | sodium |
| Answer» C. potassium | |
| 24. |
When electron jumps in n1 orbit the series of spectral lines obtained is called |
| A. | Balmer series |
| B. | Pfund series |
| C. | Brackett series |
| D. | Lyman series |
| Answer» E. | |
| 25. |
Rutherford in his atomic model could not explain the behavior of |
| A. | electrons |
| B. | protons |
| C. | neutrons |
| D. | neutrino |
| Answer» B. protons | |
| 26. |
The mass of proton in amu is |
| A. | 1.0067 |
| B. | 1.0073 |
| C. | 1.009 |
| D. | 1.008 |
| Answer» C. 1.009 | |
| 27. |
The air in Millikan oil drop method which is present between the electrodes is oxidized by |
| A. | chromatography |
| B. | gamma rays |
| C. | X rays |
| D. | infrared waves |
| Answer» D. infrared waves | |
| 28. |
The probability of finding electron in hydrogen atom is at |
| A. | 0.56nm |
| B. | 0.053nm |
| C. | 0.09nm |
| D. | 0.098nm |
| Answer» C. 0.09nm | |
| 29. |
Frequency is represented by |
| A. | s |
| B. | l |
| C. | n |
| D. | p |
| Answer» D. p | |
| 30. |
The quantum number is measure of size of electronic shell which is |
| A. | qualitative |
| B. | quantitative |
| C. | none |
| D. | basic |
| Answer» C. none | |
| 31. |
The spectral lines obtained for hydrogen atom are divided into |
| A. | two groups |
| B. | three groups |
| C. | four groups |
| D. | five groups |
| Answer» E. | |
| 32. |
Electric field deflect the beams of |
| A. | electrons |
| B. | protons |
| C. | neutron |
| D. | both a and b |
| Answer» E. | |
| 33. |
The new elements discovered by Moseley were |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» C. four | |
| 34. |
The spectrum has |
| A. | three types |
| B. | two types |
| C. | five types |
| D. | seven types |
| Answer» C. five types | |
| 35. |
Principle quantum number is represented by |
| A. | n |
| B. | m |
| C. | l |
| D. | p |
| Answer» B. m | |
| 36. |
Continuous spectrum is the characteristic of matter which is present in |
| A. | independent units |
| B. | bulk |
| C. | space |
| D. | gases |
| Answer» C. space | |
| 37. |
The series which is further divided into smaller lines is |
| A. | Balmer series |
| B. | Pfund series |
| C. | Brackett series |
| D. | Lyman series |
| Answer» B. Pfund series | |
| 38. |
Line spectrum is actually characteristic of |
| A. | liquids |
| B. | gases |
| C. | atom |
| D. | plasma |
| Answer» D. plasma | |
| 39. |
The new element formed by reaction of alpha particles with Beryllium is |
| A. | nitrogen |
| B. | hydrogen |
| C. | carbon |
| D. | zinc |
| Answer» D. zinc | |
| 40. |
The rainbow is obtained from light of |
| A. | sun |
| B. | moon |
| C. | firefly |
| D. | butterfly |
| Answer» B. moon | |
| 41. |
Planck proposed that energy travels in |
| A. | discontinuous manner |
| B. | continuous manner |
| C. | does not travel |
| D. | random |
| Answer» B. continuous manner | |
| 42. |
By magnetic field cathode rays are deflected in |
| A. | circular path |
| B. | straight path |
| C. | curved path |
| D. | round path |
| Answer» B. straight path | |
| 43. |
The colors of spectrum merge in |
| A. | line spectrum |
| B. | continuous spectrum |
| C. | hydrogen spectrum |
| D. | nitrogen spectrum |
| Answer» C. hydrogen spectrum | |
| 44. |
The discovery of protons was commenced in the year |
| A. | 1889 |
| B. | 1880 |
| C. | 1878 |
| D. | 1896 |
| Answer» E. | |
| 45. |
Work was done on wave theories by |
| A. | two scientists |
| B. | three scientists |
| C. | four scientists |
| D. | five scientists |
| Answer» C. four scientists | |
| 46. |
The splitting of spectral lines because of electric effect is known as |
| A. | Zeeman effect |
| B. | electromagnetic effect |
| C. | Stark effect |
| D. | none |
| Answer» D. none | |
| 47. |
Diffraction is a property of |
| A. | waves |
| B. | particles |
| C. | solids |
| D. | gases |
| Answer» B. particles | |
| 48. |
Number of space orientation of any energy level of s-sub shell is |
| A. | two |
| B. | three |
| C. | one |
| D. | none |
| Answer» D. none | |
| 49. |
The second orbit of hydrogen is far from first orbit at about |
| A. | two times |
| B. | six times |
| C. | four times |
| D. | nine times |
| Answer» D. nine times | |
| 50. |
The value of Z for hydrogen atom is actually |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |