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. |
Sub shell which is not sub-divided into any other orbital is termed as |
| A. | p-sub shell |
| B. | s-sub shell |
| C. | d-sub shell |
| D. | f-sub shell |
| Answer» C. d-sub shell | |
| 2. |
Quantum numbers are solution to |
| A. | Dirac equation |
| B. | Schrodinger equation |
| C. | Rutherford equation |
| D. | Bohr equation |
| Answer» C. Rutherford equation | |
| 3. |
In line spectrum of sodium number of lines obtained are |
| A. | three |
| B. | two |
| C. | four |
| D. | five |
| Answer» C. four | |
| 4. |
Orbits in which electrons can revolve have fixed |
| A. | shape |
| B. | route |
| C. | thickness |
| D. | angular momentum |
| Answer» E. | |
| 5. |
The region outside nucleus where electrons (e⁻) revolve is called |
| A. | energy level only |
| B. | quantum shell only |
| C. | bonding level |
| D. | energy level and quantum shell |
| Answer» E. | |
| 6. |
Radiations of all wavelengths are present in |
| A. | yellow light |
| B. | black light |
| C. | white light |
| D. | brown light |
| Answer» D. brown light | |
| 7. |
Each sub-shell has at least one or two |
| A. | atomic orbital's |
| B. | axis |
| C. | lobes |
| D. | zones |
| Answer» B. axis | |
| 8. |
Losing a small molecule from the original organic molecule is |
| A. | elimination reaction |
| B. | substitution reaction |
| C. | addition reaction |
| D. | none of above |
| Answer» B. substitution reaction | |
| 9. |
Magnetic properties of cathode rays were discovered in |
| A. | 1897 |
| B. | 1890 |
| C. | 1895 |
| D. | 1870 |
| Answer» D. 1870 | |
| 10. |
Proton was a name given by |
| A. | Stoney |
| B. | Einstein |
| C. | Rutherford |
| D. | Frederick Sanger |
| Answer» D. Frederick Sanger | |
| 11. |
Radius of hydrogen first orbit is |
| A. | 0.529 angstrom |
| B. | 2.11 angstrom |
| C. | 13.22 angstrom |
| D. | 4.75 angstrom |
| Answer» B. 2.11 angstrom | |
| 12. |
When electron remains between orbits its momentum is |
| A. | quantized |
| B. | dequantized |
| C. | emitted |
| D. | changed always |
| Answer» B. dequantized | |
| 13. |
Cathode rays produce glow on |
| A. | adjacent wall |
| B. | parallel wall |
| C. | opposite wall |
| D. | no glow produced |
| Answer» D. no glow produced | |
| 14. |
Angular momentum is represented by |
| A. | mcs |
| B. | mvr |
| C. | mv |
| D. | mr |
| Answer» C. mv | |
| 15. |
The attractive forces between metal ions and delocalized electrons can be made weaker only at |
| A. | high temperatures |
| B. | high pressures |
| C. | low pressures |
| D. | low temperature |
| Answer» B. high pressures | |
| 16. |
N+l value of 3d orbital is |
| A. | 8 |
| B. | 2 |
| C. | 5 |
| D. | 3 |
| Answer» D. 3 | |
| 17. |
Neutron have not property of |
| A. | producing neutrino |
| B. | ionize gases |
| C. | penetration |
| D. | being neutral |
| Answer» C. penetration | |
| 18. |
Electric charge on cathode rays was discovered by application of |
| A. | magnetic field |
| B. | electric field |
| C. | neutral field |
| D. | none of these |
| Answer» C. neutral field | |
| 19. |
Background in atomic emission spectrum is |
| A. | light |
| B. | dark |
| C. | pink |
| D. | blue spaces |
| Answer» C. pink | |
| 20. |
Boundary line between colors cannot be marked in |
| A. | line spectrum |
| B. | continuous spectrum |
| C. | hydrogen spectrum |
| D. | nitrogen spectrum |
| Answer» C. hydrogen spectrum | |
| 21. |
N+l value of 6d orbital is |
| A. | 8 |
| B. | 7 |
| C. | 6 |
| D. | 9 |
| Answer» B. 7 | |
| 22. |
Zeeman effect could not be explained by |
| A. | Rutherford model |
| B. | Bohr model |
| C. | Classical model |
| D. | Modern model |
| Answer» C. Classical model | |
| 23. |
Character of p-orbital which determines geometry of molecules is |
| A. | non directional |
| B. | directional |
| C. | vertical |
| D. | horizontal |
| Answer» C. vertical | |
| 24. |
Along with paraffin neutrons can expel protons from |
| A. | water |
| B. | paper |
| C. | cellulose |
| D. | all of these |
| Answer» E. | |
| 25. |
In tritium, number of neutrons is |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 0 |
| Answer» C. 1 | |
| 26. |
Frequency can be calculated by |
| A. | c*wave number |
| B. | quantity*wave number |
| C. | atom*wave number |
| D. | molecule*wave number |
| Answer» B. quantity*wave number | |
| 27. |
If nucleon and proton number of manganese is 24 and 12 respectively, number of electrons and protons will be |
| A. | 36,12 |
| B. | 12,12 |
| C. | 24,24 |
| D. | 12,24 |
| Answer» C. 24,24 | |
| 28. |
Radiations' bending strength depends upon |
| A. | size of photons |
| B. | distance of photons |
| C. | energy of photons |
| D. | wavelength of photons |
| Answer» E. | |
| 29. |
Basic concept of Dual nature of matter was given by |
| A. | Planck's quantum theory |
| B. | Einstein theory |
| C. | Rutherford theory |
| D. | Nicola's Theory |
| Answer» B. Einstein theory | |
| 30. |
Pressure inside tube to discover electrons effect |
| A. | voltage |
| B. | pressure |
| C. | heat |
| D. | sensitivity |
| Answer» B. pressure | |
| 31. |
When electron jumps from inner orbit to outer orbit energy is |
| A. | absorbed |
| B. | released |
| C. | doubled |
| D. | constant |
| Answer» B. released | |
| 32. |
E/m value of electron is measured for certain mass of electrons whose minimum value is |
| A. | 2 kg |
| B. | 9 kg |
| C. | 1 kg |
| D. | 6 kg |
| Answer» D. 6 kg | |
| 33. |
During the elimination reaction of Halogenoalkanes, the reagent used is |
| A. | ethanolic sodium hydroxide |
| B. | ethanoic acid |
| C. | ethanoate |
| D. | ethane |
| Answer» B. ethanoic acid | |
| 34. |
Detector used in Rutherford experiment is |
| A. | cathode rays |
| B. | cadmium plate |
| C. | photographic plate |
| D. | silver |
| Answer» D. silver | |
| 35. |
Background in atomic absorption spectrum is |
| A. | bright |
| B. | dark |
| C. | brown |
| D. | purple |
| Answer» B. dark | |
| 36. |
The electronic configuration of chromium is |
| A. | [Ar]3d⁵,4s¹ |
| B. | [Ar]2d⁴,4s² |
| C. | [Ar]2d⁵,4s² |
| D. | [Ar]2d⁴,4s¹ |
| Answer» B. [Ar]2d⁴,4s² | |
| 37. |
When electron jumps from excited state to a ground state observed spectra is |
| A. | emission spectra |
| B. | absorption spectra |
| C. | normal spectra |
| D. | formal spectra |
| Answer» B. absorption spectra | |
| 38. |
Comprehensive study on X rays was done by |
| A. | Sommerfeld |
| B. | Moseley |
| C. | Bohr |
| D. | Rutherford |
| Answer» C. Bohr | |
| 39. |
Cl has the electronic configuration of |
| A. | 1s², 2s², 2p⁶, 3s² |
| B. | 1s², 2s², 3s², 3p⁵ |
| C. | 1s², 2s², 2p⁶, 3p⁵ |
| D. | 1s², 2s², 2p⁶, 3s², 3p⁵ |
| Answer» B. 1s², 2s², 3s², 3p⁵ | |
| 40. |
Absorbed wavelengths in atomic absorption spectrum appear as |
| A. | dark background |
| B. | dark lines |
| C. | light background |
| D. | light lines |
| Answer» C. light background | |
| 41. |
Light energy comes in form of |
| A. | proton |
| B. | positron |
| C. | photon |
| D. | neutron |
| Answer» D. neutron | |
| 42. |
orbit of hydrogen which is sixteen times away from first orbit is |
| A. | fifth orbit |
| B. | second orbit |
| C. | third orbit |
| D. | fourth orbit |
| Answer» E. | |
| 43. |
Cathode rays can produce fluorescence in |
| A. | rare earths |
| B. | metals |
| C. | surface area |
| D. | pressure |
| Answer» B. metals | |
| 44. |
Spectrum of hydrogen can be obtained in |
| A. | test tube |
| B. | discharge tube |
| C. | glass |
| D. | space |
| Answer» C. glass | |
| 45. |
B' in Moseley equation is |
| A. | proportionality constant |
| B. | screening constant |
| C. | double constant |
| D. | Rydberg constant |
| Answer» C. double constant | |
| 46. |
Purpose of a mass spectrometer is to |
| A. | determine the charge of a particle |
| B. | determine the particles |
| C. | determine the mass of an atom |
| D. | provide data for data loggers |
| Answer» D. provide data for data loggers | |
| 47. |
Chemical elements are represented by Greek or Latin |
| A. | alphabets |
| B. | symbols |
| C. | gods |
| D. | illusions |
| Answer» C. gods | |
| 48. |
Chemical elements contains only |
| A. | one type of atom |
| B. | two type of atom |
| C. | molecules |
| D. | ions |
| Answer» B. two type of atom | |
| 49. |
If n=1, maximum number of electrons in a shell can be recalled through formulae |
| A. | 2n |
| B. | 2n2 |
| C. | 2n3 |
| D. | 2n4 |
| Answer» C. 2n3 | |
| 50. |
In periodic table, number of valence electron is one, in |
| A. | Group-I |
| B. | Group-II |
| C. | Group-III |
| D. | Noble gases |
| Answer» B. Group-II | |