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. |
The number of degenerate orbitals in d-sub shell are |
| A. | three |
| B. | one |
| C. | five |
| D. | six |
| Answer» D. six | |
| 2. |
The element which has 1s22s22p2x2p2y2p2 electronic configuration is |
| A. | Neon |
| B. | boron |
| C. | fluorine |
| D. | carbon |
| Answer» B. boron | |
| 3. |
Total number of electrons in d-sub shell are |
| A. | 2 |
| B. | 8 |
| C. | 4 |
| D. | 10 |
| Answer» E. | |
| 4. |
The movement of positive rays is from holes in |
| A. | anode |
| B. | neutrons |
| C. | cathode |
| D. | anti neutron |
| Answer» D. anti neutron | |
| 5. |
The element which has [Ar]4s2 electronic configuration is |
| A. | potassium |
| B. | calcium |
| C. | copper |
| D. | zinc |
| Answer» C. copper | |
| 6. |
The difference in values of energy of electron increases from |
| A. | lower to higher orbits |
| B. | higher to lower orbits |
| C. | same orbits |
| D. | none |
| Answer» C. same orbits | |
| 7. |
The letter 'f' in azimuthal quantum number represents |
| A. | fundamental |
| B. | friction |
| C. | force |
| D. | first |
| Answer» B. friction | |
| 8. |
The charge on proton is positive whose value in coulomb is |
| A. | x10-27 |
| B. | x10-27 |
| C. | x10-19 |
| D. | x10-27 |
| Answer» D. x10-27 | |
| 9. |
Cathode rays can produce shadow when the object placed in their path is |
| A. | transparent |
| B. | translucent |
| C. | solid |
| D. | opaque |
| Answer» E. | |
| 10. |
The dispersion of white light when passed through prism is known as |
| A. | spectrum |
| B. | spectrophotometer |
| C. | wavelength |
| D. | length |
| Answer» B. spectrophotometer | |
| 11. |
Frequency is measured for |
| A. | one minute |
| B. | one hour |
| C. | one second |
| D. | one millisecond |
| Answer» D. one millisecond | |
| 12. |
x105 wave number is for spectral line |
| A. | Hα |
| B. | HΒ |
| C. | Hγ |
| D. | Hω |
| Answer» B. HΒ | |
| 13. |
The fluorescence produced by cathode rays in alumina is |
| A. | red |
| B. | blue |
| C. | green |
| D. | yellow |
| Answer» B. blue | |
| 14. |
When gamma radiations are emitted from copper it is changed into |
| A. | Sulphur |
| B. | carbon tetrachloride |
| C. | zinc |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 15. |
The value of radius in angstrom for fourth radius of hydrogen atom is |
| A. | 0.529 angstrom |
| B. | 2.11 angstrom |
| C. | 8.4angstrom |
| D. | 13.22 angstrom |
| Answer» D. 13.22 angstrom | |
| 16. |
The spectrum of hydrogen is obtained at |
| A. | low pressure |
| B. | high pressure |
| C. | very low pressure |
| D. | high temperature |
| Answer» D. high temperature | |
| 17. |
Proton was a name given by |
| A. | Stoney |
| B. | Einstein |
| C. | Rutherford |
| D. | none |
| Answer» D. none | |
| 18. |
The line spectrum is obtained from element or compound which is |
| A. | volatilized |
| B. | present in solid |
| C. | present in liquid state |
| D. | nitrogen spectrum |
| Answer» B. present in solid | |
| 19. |
The +1 is the relative charge which is present on |
| A. | proton |
| B. | electrons |
| C. | neutrons |
| D. | neutrino |
| Answer» B. electrons | |
| 20. |
The distance between two adjacent crests or troughs is called |
| A. | wave number |
| B. | frequency |
| C. | wave length |
| D. | radiation |
| Answer» D. radiation | |
| 21. |
Davisson performed his experiment in |
| A. | 1924 |
| B. | 1927 |
| C. | 1930 |
| D. | 987 |
| Answer» C. 1930 | |
| 22. |
Angular momentum is represented by |
| A. | mcs |
| B. | mvr |
| C. | mv |
| D. | mr |
| Answer» C. mv | |
| 23. |
The number of lobes in the fifth d-orbital are |
| A. | four |
| B. | eight |
| C. | two |
| D. | three |
| Answer» D. three | |
| 24. |
Alkane molecules are not attacked by electrophiles or neutrophiles hence they are |
| A. | non-polar |
| B. | polar |
| C. | unstable |
| D. | volatile |
| Answer» B. polar | |
| 25. |
Photographic plate in Rutherford experiment was coated with |
| A. | Zn sulphide |
| B. | cadmium chloride |
| C. | silver chloride |
| D. | titanium |
| Answer» B. cadmium chloride | |
| 26. |
The number of degenerate orbitals in s-sub shell are |
| A. | two |
| B. | four |
| C. | one |
| D. | zero |
| Answer» E. | |
| 27. |
Accelerated electrons like waves performed |
| A. | diffraction |
| B. | movement |
| C. | absorbed potential energy |
| D. | none |
| Answer» B. movement | |
| 28. |
The n+l value of4f orbital is |
| A. | 3 |
| B. | 9 |
| C. | 8 |
| D. | 7 |
| Answer» E. | |
| 29. |
The mass of electron which was determined by experiments is |
| A. | x10-19 |
| B. | x1011 coulombs per kg |
| C. | x10-19 coulombs |
| D. | x10-31kg |
| Answer» E. | |
| 30. |
The spectrum obtained by X Rays is |
| A. | continuous spectrum |
| B. | line spectrum |
| C. | hydrogen spectrum |
| D. | none |
| Answer» C. hydrogen spectrum | |
| 31. |
The relationship between frequency and wavelength is that they are |
| A. | inversely proportional |
| B. | directly proportional |
| C. | not related |
| D. | no relation |
| Answer» B. directly proportional | |
| 32. |
Quantum theory was proposed in |
| A. | 1900 |
| B. | 1890 |
| C. | 1234 |
| D. | 1788 |
| Answer» B. 1890 | |
| 33. |
The actual charge on one electron is |
| A. | x10-19 |
| B. | x10-19 |
| C. | x10-19 |
| D. | x10-19 |
| Answer» D. x10-19 | |
| 34. |
The lobes of d-orbitals which lie between the axis are |
| A. | first three |
| B. | last three |
| C. | last two |
| D. | only first |
| Answer» B. last three | |
| 35. |
The size of 2s-orbital as compared to 1s-orbital is |
| A. | large |
| B. | small |
| C. | very large |
| D. | none |
| Answer» B. small | |
| 36. |
When electron remains between orbits its momentum is |
| A. | quantized |
| B. | dequantized |
| C. | emitted |
| D. | changed always |
| Answer» B. dequantized | |
| 37. |
Detector used in Rutherford experiment is |
| A. | cathode rays |
| B. | cadmium plate |
| C. | photographic plate |
| D. | silver |
| Answer» D. silver | |
| 38. |
The radiations emitted when slow moving neutrons hits Copper metal are |
| A. | alpha radiations |
| B. | beta radiations |
| C. | gamma radiations |
| D. | none |
| Answer» D. none | |
| 39. |
The shape of five d-orbitals is |
| A. | identical |
| B. | symmetric |
| C. | spherical |
| D. | non identical |
| Answer» E. | |
| 40. |
Cathode rays can move a paddle in their path this shows that they have |
| A. | momentum |
| B. | waves |
| C. | straight path |
| D. | velocity |
| Answer» B. waves | |
| 41. |
The window through which the X Rays move in experiment is made up of |
| A. | platinum |
| B. | iron |
| C. | steel |
| D. | aluminium |
| Answer» E. | |
| 42. |
The smallest charge on electricity which has been measured till now is actually charge on |
| A. | protons |
| B. | electron |
| C. | neutrons |
| D. | neutrino |
| Answer» C. neutrons | |
| 43. |
The formula for calculating electron is |
| A. | 2(2l+1) |
| B. | (2l+1) |
| C. | 2(2l) |
| D. | none |
| Answer» D. none | |
| 44. |
In the absence of the magnetic field ,all three p-orbitals are called |
| A. | degenerate orbitals |
| B. | s-orbitals |
| C. | generate orbital |
| D. | none |
| Answer» B. s-orbitals | |
| 45. |
Atomic spectrum is also produced by heating of elements in |
| A. | solid state |
| B. | liquid state |
| C. | gaseous state |
| D. | plasma |
| Answer» D. plasma | |
| 46. |
The instrument to measure e/m value of electron was discovered by |
| A. | 1890 |
| B. | 1897 |
| C. | 1840 |
| D. | 1845 |
| Answer» C. 1840 | |
| 47. |
Energy is increased with increase in |
| A. | wavelength |
| B. | wave number |
| C. | density |
| D. | volume |
| Answer» C. density | |
| 48. |
The pressure in the chamber in Millikan oil drop method is adjusted by |
| A. | pressurize |
| B. | vacuum pump |
| C. | high pressure |
| D. | sphygmometer |
| Answer» C. high pressure | |
| 49. |
The magnetic properties of cathode were discovered by |
| A. | J Thomson |
| B. | J Perrin |
| C. | Addison |
| D. | Peter |
| Answer» C. Addison | |
| 50. |
The particles which were deflected backwards in Rutherford's experiment were hit upon by |
| A. | nucleus |
| B. | empty space |
| C. | electrons |
| D. | none |
| Answer» B. empty space | |