MCQOPTIONS
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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. |
Rutherford performed his experiment in |
| A. | 1934 |
| B. | 1911 |
| C. | 1945 |
| D. | 1989 |
| Answer» C. 1945 | |
| 2. |
The dependence of angular momentum is on |
| A. | quantum energy |
| B. | quantum number |
| C. | quantum density |
| D. | thickness |
| Answer» C. quantum density | |
| 3. |
The quantum numbers are |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» D. five | |
| 4. |
The value of the factor used for calculating energy of electrons is negative and it is |
| A. | x10-18 |
| B. | x10-18 |
| C. | x10-18 |
| D. | x10-18 |
| Answer» B. x10-18 | |
| 5. |
The voltage which is applied in discharge tube is dependent upon |
| A. | length of tube |
| B. | width of tube |
| C. | tube nature |
| D. | wideness |
| Answer» B. width of tube | |
| 6. |
The third orbit of hydrogen atom is far from first orbit at about |
| A. | three times |
| B. | two times |
| C. | four times |
| D. | nine times |
| Answer» E. | |
| 7. |
The example showing continuous spectrum is |
| A. | hydrogen |
| B. | nitrogen |
| C. | rainbow |
| D. | elements |
| Answer» D. elements | |
| 8. |
The square number of orbits is actually directly proportional to |
| A. | Radius of Hydrogen |
| B. | shape of hydrogen |
| C. | color of hydrogen |
| D. | size of hydrogen |
| Answer» B. shape of hydrogen | |
| 9. |
The unit of frequency of waves is |
| A. | per atom |
| B. | per molecule |
| C. | per second |
| D. | per cycles |
| Answer» D. per cycles | |
| 10. |
The pressure range which is applied in discharge tube is |
| A. | 9000-10000 |
| B. | 7000-9000 |
| C. | 4000-5000 |
| D. | 5000-10000 |
| Answer» E. | |
| 11. |
Radioactive copper is converted into other by emission of |
| A. | alpha particles |
| B. | beta particles |
| C. | gamma particles |
| D. | zeta particles |
| Answer» C. gamma particles | |
| 12. |
The chance of finding electron in atomic orbital is |
| A. | 90 percent |
| B. | 89 percent |
| C. | 95 percent |
| D. | 50 percent |
| Answer» D. 50 percent | |
| 13. |
The effect of electric field in cathode rays can be cancelled by application of |
| A. | surface pressure |
| B. | ionization |
| C. | magnetic field |
| D. | electricity |
| Answer» D. electricity | |
| 14. |
In the line spectrum distinct lines are observed which are separated by |
| A. | light spaces |
| B. | yellow spaces |
| C. | dark spaces |
| D. | blue spaces |
| Answer» D. blue spaces | |
| 15. |
The properties of electron and protons were completely discovered by |
| A. | 1895 |
| B. | 1899 |
| C. | 1900 |
| D. | 1980 |
| Answer» B. 1899 | |
| 16. |
The value of radius 4.75 angstrom is for |
| A. | 2nd orbit of hydrogen |
| B. | 3rd orbit of hydrogen |
| C. | 5th orbit of hydrogen |
| D. | 6th orbit of hydrogen |
| Answer» C. 5th orbit of hydrogen | |
| 17. |
Aluminium foil causes cathode rays to |
| A. | pass through it |
| B. | struck in it |
| C. | distort |
| D. | loose their identity |
| Answer» B. struck in it | |
| 18. |
The wavelength covered by Moseley was |
| A. | 0.06-9 angstrom |
| B. | 0.1-7 angstrom |
| C. | 0.04-8angstrom |
| D. | 0.07-6 angstrom |
| Answer» D. 0.07-6 angstrom | |
| 19. |
The motion which is responsible for doublet line structure in the spectrum is |
| A. | spin motion |
| B. | rotational motion |
| C. | linear motion |
| D. | vibratory motion |
| Answer» B. rotational motion | |
| 20. |
Louis de Broglie concept was given in |
| A. | 1960 |
| B. | 1930 |
| C. | 1924 |
| D. | 1987 |
| Answer» D. 1987 | |
| 21. |
The basic concept of Dual nature of matter was given by |
| A. | Planck's quantum theory |
| B. | Einstein theory |
| C. | Rutherford theory |
| D. | none |
| Answer» B. Einstein theory | |
| 22. |
The electric charge on cathode rays was discovered by application of |
| A. | magnetic field |
| B. | electric field |
| C. | neutral field |
| D. | none |
| Answer» C. neutral field | |
| 23. |
X Rays are produced in |
| A. | metal tube |
| B. | discharge tube |
| C. | aluminium tube |
| D. | mercury tube |
| Answer» C. aluminium tube | |
| 24. |
Schrodinger worked on |
| A. | particle theory |
| B. | wave theory |
| C. | energy |
| D. | none |
| Answer» C. energy | |
| 25. |
The slit through which the X Rays pass is made up of |
| A. | platinum |
| B. | aluminium |
| C. | steel |
| D. | iron |
| Answer» B. aluminium | |
| 26. |
The Balmer series has limiting line in |
| A. | UV region |
| B. | infrared region |
| C. | visible region |
| D. | radio waves region |
| Answer» B. infrared region | |
| 27. |
The electrodes used in the Millikan drop method is used to |
| A. | generate electricity |
| B. | generate pressure |
| C. | increasing volume |
| D. | increasing density |
| Answer» B. generate pressure | |
| 28. |
The energy of electron is zero |
| A. | near nucleus |
| B. | at infinity |
| C. | in first orbit |
| D. | in last orbit |
| Answer» C. in first orbit | |
| 29. |
If any two sub shells have the same (n+l) values, then that sub shell is placed first whose n value is |
| A. | larger |
| B. | smaller |
| C. | very larger |
| D. | none |
| Answer» C. very larger | |
| 30. |
For metal under consideration in X Rays the constants are |
| A. | b and c |
| B. | a and b |
| C. | c and d |
| D. | d and e |
| Answer» C. c and d | |
| 31. |
The background in atomic absorption spectrum is |
| A. | bright |
| B. | dark |
| C. | brown |
| D. | purple |
| Answer» B. dark | |
| 32. |
In Millikan oil drop method the electrode which has hole is |
| A. | lower one |
| B. | parallel one |
| C. | adjacent one |
| D. | upper one |
| Answer» E. | |
| 33. |
Near nucleus the potential energy of electron is usually less than |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 34. |
Magnetic quantum number is also called |
| A. | 1st quantum number |
| B. | 2nd quantum number |
| C. | 3rd quantum number |
| D. | 4th quantum number |
| Answer» D. 4th quantum number | |
| 35. |
Fast neutrons have energy which is more than |
| A. | 1.6MeV |
| B. | 1.2MeV |
| C. | 1.9MeV |
| D. | 6Mev |
| Answer» C. 1.9MeV | |
| 36. |
For the production of neutrons alpha particles are targeted on |
| A. | beryllium |
| B. | tin |
| C. | tungsten |
| D. | lead |
| Answer» B. tin | |
| 37. |
The upward driving force in oil drop method is given by |
| A. | E |
| B. | mg |
| C. | Ee |
| D. | Ee+mg |
| Answer» D. Ee+mg | |
| 38. |
The d-sub shell have shape which is |
| A. | simple |
| B. | doubtful |
| C. | none |
| D. | complicated |
| Answer» E. | |
| 39. |
Quantum numbers are solution to |
| A. | Dirac equation |
| B. | Schrodinger equation |
| C. | Rutherford equation |
| D. | Bohr equation |
| Answer» C. Rutherford equation | |
| 40. |
The number of degenerate orbitals in p-sub shell are |
| A. | four |
| B. | three |
| C. | two |
| D. | five |
| Answer» C. two | |
| 41. |
The wavelength 550nm-600nm shows |
| A. | red color |
| B. | blue color |
| C. | yellow color |
| D. | orange color |
| Answer» D. orange color | |
| 42. |
The relative charge which is present on proton is |
| A. | −1 |
| B. | 1 |
| C. | 2 |
| D. | −2 |
| Answer» C. 2 | |
| 43. |
Outer electrons in atoms in Rutherford model |
| A. | are stationary |
| B. | are not stationary |
| C. | no electrons in outer shell |
| D. | none |
| Answer» C. no electrons in outer shell | |
| 44. |
Line spectrum of hydrogen after a certain wavelength becomes |
| A. | splitted |
| B. | distorted |
| C. | changed |
| D. | continuous |
| Answer» E. | |
| 45. |
The boundary line between colors cannot be marked in |
| A. | line spectrum |
| B. | continuous spectrum |
| C. | hydrogen spectrum |
| D. | nitrogen spectrum |
| Answer» C. hydrogen spectrum | |
| 46. |
The lines which are present in atomic emission spectrum are |
| A. | brown |
| B. | dark |
| C. | bright |
| D. | translucent |
| Answer» D. translucent | |
| 47. |
Along with paraffin neutrons can expel protons from |
| A. | water |
| B. | paper |
| C. | cellulose |
| D. | all |
| Answer» E. | |
| 48. |
The range of visible light is from |
| A. | 400-750nm |
| B. | 600-800nm |
| C. | 500-800nm |
| D. | 300-600nm |
| Answer» B. 600-800nm | |
| 49. |
Neutrons are used to carry out nuclear reactions when they are used as |
| A. | surface molecules |
| B. | projectiles |
| C. | balls |
| D. | surface |
| Answer» C. balls | |
| 50. |
Spectral lines for X-rays are divided into major groups which are |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» B. three | |