MCQOPTIONS
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MCQOPTIONS
This section includes 551 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The movement of electrons in transition elements within d-orbital gives |
| A. | color |
| B. | mass |
| C. | polarity |
| D. | viscosity |
| Answer» B. mass | |
| 2. |
Number of electrons in outer most shell of alkali metals are |
| A. | two |
| B. | eight |
| C. | one |
| D. | five |
| Answer» D. five | |
| 3. |
Chemical properties of an element are largely derived through |
| A. | its position in the periodic table |
| B. | the proton number of an element |
| C. | the nucleon number of element |
| D. | the number of valence electrons |
| Answer» E. | |
| 4. |
Charge on oil droplet is actually charge on |
| A. | one electron |
| B. | two protons |
| C. | neutrons |
| D. | two neutrons |
| Answer» B. two protons | |
| 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. |
In periodic table, non-metals are found in the |
| A. | right hand side |
| B. | left hand side |
| C. | extreme right hand side |
| D. | bottom of the periodic table |
| Answer» B. left hand side | |
| 7. |
Surface where probability for finding electron is zero between two orbitals is called |
| A. | nodal surface |
| B. | plane surface |
| C. | curve surface |
| D. | smooth surface |
| Answer» B. plane surface | |
| 8. |
Spectral lines of hydrogen atom which are present in visible region are named as |
| A. | Bracket series |
| B. | Balmer series |
| C. | Lyman series |
| D. | Paschen series |
| Answer» C. Lyman series | |
| 9. |
Cathode rays are not simply rays but they are actually |
| A. | mass |
| B. | material particles |
| C. | velocity |
| D. | shaped molecules |
| Answer» C. velocity | |
| 10. |
Value of energy for second orbit of hydrogen in kilo joule per mole is |
| A. | −328.32 |
| B. | −1313.31 |
| C. | −145.92 |
| D. | −82.08 |
| Answer» B. −1313.31 | |
| 11. |
The atoms of element convert into ions upon being |
| A. | distilled |
| B. | vaporized |
| C. | solidified |
| D. | condensed |
| Answer» C. solidified | |
| 12. |
The -1.6x10⁻¹⁹ C is the charge on single |
| A. | electron (e⁻) |
| B. | proton (p⁺) |
| C. | neutron (n⁰) |
| D. | positron (e⁺) |
| Answer» B. proton (p⁺) | |
| 13. |
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 | |
| 14. |
Value of energy of electron for fourth orbit of hydrogen atom is |
| A. | −328.32 |
| B. | −1313.31 |
| C. | −82.08 |
| D. | −145.92 |
| Answer» D. −145.92 | |
| 15. |
For discovery of neutron stream of particles was used which are |
| A. | alpha particles |
| B. | beta particles |
| C. | gamma particles |
| D. | tetra particles |
| Answer» B. beta particles | |
| 16. |
When alpha particle from nitrogen is ejected atom reduced is |
| A. | Boron |
| B. | nitrogen |
| C. | Sulphur |
| D. | carbon |
| Answer» B. nitrogen | |
| 17. |
Quantum number is measure of size of electronic shell, which is |
| A. | qualitative |
| B. | quantitative |
| C. | both a and b |
| D. | basic |
| Answer» C. both a and b | |
| 18. |
N+l value of 5f orbital is |
| A. | 3 |
| B. | 8 |
| C. | 6 |
| D. | 4 |
| Answer» C. 6 | |
| 19. |
In an atom, number of protons and neutrons are added to obtain |
| A. | number of electrons |
| B. | number of nucleons |
| C. | atomic number of element |
| D. | number of positrons |
| Answer» C. atomic number of element | |
| 20. |
E/m of electrons as compared to positive rays is |
| A. | equal |
| B. | greater |
| C. | smaller |
| D. | medium |
| Answer» C. smaller | |
| 21. |
Number of protons in nucleus is similar to number of |
| A. | neutrons |
| B. | neutrino |
| C. | positrons |
| D. | electrons |
| Answer» E. | |
| 22. |
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 | |
| 23. |
Total number of electrons in s-sub shell are |
| A. | 8 |
| B. | 6 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 24. |
Chance of finding electron in atomic orbital is |
| A. | 90 percent |
| B. | 89 percent |
| C. | 95 percent |
| D. | 50 percent |
| Answer» D. 50 percent | |
| 25. |
Value of radius 2.11 angstrom is for |
| A. | 2nd orbit of hydrogen |
| B. | 3rd orbit of hydrogen |
| C. | 5th orbit of hydrogen |
| D. | 6th orbit of hydrogen |
| Answer» B. 3rd orbit of hydrogen | |
| 26. |
Fourth series which is obtained in hydrogen spectrum is |
| A. | Lyman series |
| B. | Balmer series |
| C. | Brackett series |
| D. | Pfund series |
| Answer» D. Pfund series | |
| 27. |
Angular momentum of orbit is actually integral multiple of |
| A. | h/2π |
| B. | h/3π |
| C. | h/9π |
| D. | h/9π |
| Answer» B. h/3π | |
| 28. |
Physical and chemical properties of elements are affected by |
| A. | atomic number |
| B. | atomic masses |
| C. | neutrons |
| D. | protons |
| Answer» B. atomic masses | |
| 29. |
Neutron was discovered by |
| A. | Rutherford |
| B. | Thomson |
| C. | J Perrin |
| D. | Chadwick |
| Answer» E. | |
| 30. |
Value of ionization energy for hydrogen atom is |
| A. | 1313.31kJ/mole |
| B. | 234kJ/mole |
| C. | 1717.71kJ/mole |
| D. | 1567kj/mole |
| Answer» B. 234kJ/mole | |
| 31. |
Relative charge on neutron is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» E. | |
| 32. |
Each orbit possesses |
| A. | quantum energy |
| B. | density of radiation |
| C. | volume |
| D. | boundary |
| Answer» B. density of radiation | |
| 33. |
Continuous spectrum is characteristic of matter which is present in |
| A. | independent units |
| B. | bulk |
| C. | space |
| D. | gases |
| Answer» C. space | |
| 34. |
Same number of shells are found in elements of |
| A. | same group |
| B. | same period |
| C. | same type |
| D. | same mass number |
| Answer» C. same type | |
| 35. |
The strength of metallic bonding also increases with the increase in |
| A. | positive charge only |
| B. | electron's mobility only |
| C. | negative charge |
| D. | positive charge and electron's mobility |
| Answer» E. | |
| 36. |
The sum of protons (p⁺) and neutrons (n⁰) in an atom is called its |
| A. | atomic number |
| B. | nucleon number |
| C. | Avogadro's number |
| D. | protonic identity |
| Answer» C. Avogadro's number | |
| 37. |
Vacuum permittivity is represented by |
| A. | ε |
| B. | η |
| C. | γ |
| D. | λ |
| Answer» B. η | |
| 38. |
Electric properties of cathode rays were discovered by |
| A. | J Perrin |
| B. | Peter |
| C. | J Thomson |
| D. | Edward |
| Answer» D. Edward | |
| 39. |
Mass of neutron in amu is |
| A. | 1.0073 |
| B. | 1.0087 |
| C. | 1.0098 |
| D. | 1.0065 |
| Answer» C. 1.0098 | |
| 40. |
Neutrons which are used for fission purposes are |
| A. | slow neutrons |
| B. | fast neutrons |
| C. | moderate neutrons |
| D. | none of these |
| Answer» B. fast neutrons | |
| 41. |
Expression for nth radius of atom was derived by |
| A. | Rutherford |
| B. | Bohr |
| C. | Edward |
| D. | J Thomson |
| Answer» C. Edward | |
| 42. |
Value of azimuthal quantum number starts from |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 43. |
Alpha particles used by Rutherford was obtained from |
| A. | polonium |
| B. | titanium |
| C. | tactinium |
| D. | none of these |
| Answer» B. titanium | |
| 44. |
An Electric field deflects the beams of |
| A. | protons only |
| B. | electrons only |
| C. | neutrons |
| D. | protons and electrons |
| Answer» E. | |
| 45. |
Light which is obtained from hydrogen spectrum is |
| A. | greenish |
| B. | yellow |
| C. | bluish |
| D. | purplish |
| Answer» D. purplish | |
| 46. |
Helium (He) is not an inert gas because |
| A. | it is chemically very reactive |
| B. | it lacks a full shell of valence electrons |
| C. | both a and b |
| D. | it has no electrons |
| Answer» D. it has no electrons | |
| 47. |
The number of times a p⁺ is heavier than an e⁻ is |
| A. | 18 times |
| B. | 184 times |
| C. | 200 times |
| D. | 1840 times |
| Answer» E. | |
| 48. |
Charge on oil droplets can be changed by change of |
| A. | electric field |
| B. | magnetic field |
| C. | positive fields |
| D. | negative field |
| Answer» B. magnetic field | |
| 49. |
The electrons which are not associated with a single type of atom are termed as |
| A. | spectators |
| B. | delocalized |
| C. | lone pair |
| D. | mobile |
| Answer» C. lone pair | |
| 50. |
Azimuthal quantum number is represented by |
| A. | m |
| B. | n |
| C. | l |
| D. | p |
| Answer» D. p | |