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. |
Mass of proton in amu is |
| A. | 1.0067 |
| B. | 1.0073 |
| C. | 1.009 |
| D. | 1.008 |
| Answer» C. 1.009 | |
| 2. |
By magnetic field cathode rays are deflected in |
| A. | circular path |
| B. | straight path |
| C. | curved path |
| D. | round path |
| Answer» B. straight path | |
| 3. |
Davisson performed his experiment in |
| A. | 1924 |
| B. | 1927 |
| C. | 1930 |
| D. | 987 |
| Answer» C. 1930 | |
| 4. |
Proton number of Fluorine (F) is 9, electron number is |
| A. | 2,5 |
| B. | 2,7 |
| C. | 2,9 |
| D. | 2,6 |
| Answer» C. 2,9 | |
| 5. |
Number of degenerate orbitals in f-sub shell are |
| A. | six |
| B. | five |
| C. | seven |
| D. | three |
| Answer» D. three | |
| 6. |
Neutrons having energy less than 1eV are called |
| A. | slow neutrons |
| B. | fast neutrons |
| C. | moderate neutrons |
| D. | extra neutrons |
| Answer» B. fast neutrons | |
| 7. |
The sum of protons and neutrons in an atom gives off |
| A. | nucleon number only |
| B. | mass number only |
| C. | atomic number |
| D. | nucleon and mass number |
| Answer» E. | |
| 8. |
The pathway of electron is called |
| A. | orbit |
| B. | orbital |
| C. | axis |
| D. | electric path |
| Answer» C. axis | |
| 9. |
Louis de Broglie concept was given in |
| A. | 1960 |
| B. | 1930 |
| C. | 1924 |
| D. | 1987 |
| Answer» D. 1987 | |
| 10. |
In case of radiation amount of energy is proportional to |
| A. | frequency of radiation |
| B. | density of radiation |
| C. | waves |
| D. | light |
| Answer» B. density of radiation | |
| 11. |
Glow in discharge tube disappears when pressure is |
| A. | 09 torr |
| B. | 0.01 torr |
| C. | 0.8 torr |
| D. | 0.9 torr |
| Answer» C. 0.8 torr | |
| 12. |
For L shell value of n is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 13. |
Elements with 4-7 valence electrons are referred to as |
| A. | metals |
| B. | non-metals |
| C. | inert gases |
| D. | transition metals |
| Answer» C. inert gases | |
| 14. |
The atomic number of Strontium (Sr) is |
| A. | 12 |
| B. | 38 |
| C. | 20 |
| D. | 56 |
| Answer» C. 20 | |
| 15. |
Attractions of electrons towards anode shows |
| A. | electrons are negatively charged only |
| B. | electrons carry very small mass only |
| C. | electrons carry more mass than protons |
| D. | electrons are negatively charged and carry very small mass |
| Answer» E. | |
| 16. |
The electrons (e⁻) of the quantum shells, which are further away from nucleus retain attraction, which is |
| A. | more |
| B. | less |
| C. | neutral |
| D. | variable depending on the surroundings |
| Answer» C. neutral | |
| 17. |
Charge to mass ratio was first calculated by |
| A. | J.J.Thomas |
| B. | Thomas Edison |
| C. | J.K Thomas |
| D. | A.Einstein |
| Answer» B. Thomas Edison | |
| 18. |
Letter 'd' in azimuthal quantum number represents |
| A. | diffused |
| B. | dumbbell |
| C. | double |
| D. | density |
| Answer» B. dumbbell | |
| 19. |
X Rays produced in experiment are emitted in |
| A. | one direction |
| B. | two direction |
| C. | three direction |
| D. | all direction |
| Answer» E. | |
| 20. |
There is refraction and bending of light when radiation is passed through |
| A. | plastic |
| B. | solid |
| C. | prism |
| D. | wood |
| Answer» D. wood | |
| 21. |
The most composition of sun is mainly |
| A. | oxygen and hydrogen |
| B. | hydrogen |
| C. | hydrogen and helium |
| D. | helium |
| Answer» D. helium | |
| 22. |
Shape of lobes which touch each other at origin of p-sub shell is |
| A. | sphere |
| B. | circle |
| C. | egg |
| D. | triangle |
| Answer» D. triangle | |
| 23. |
The letters denote sub-shells are |
| A. | s, p, d, f |
| B. | S, P, D, F |
| C. | l, m, n, p |
| D. | s, p, l, m |
| Answer» B. S, P, D, F | |
| 24. |
By help of Moseley law atomic number of |
| A. | rare earths was find |
| B. | halogens was discovered |
| C. | hydrogen was determined |
| D. | none of these |
| Answer» B. halogens was discovered | |
| 25. |
Electrons in experiment of X Ray production are produced by |
| A. | mercury filament |
| B. | tin filament |
| C. | sodium metal |
| D. | tungsten filament |
| Answer» E. | |
| 26. |
If proton (p+) number of an element changes, |
| A. | it will become an isotope |
| B. | it will become another element |
| C. | it will become an electrolyte |
| D. | it will sublimate immediately |
| Answer» C. it will become an electrolyte | |
| 27. |
Wave numbers decrease from |
| A. | Lyman to Pfund series |
| B. | pfund to Lyman series |
| C. | balmer series to Barackett series |
| D. | all of these |
| Answer» B. pfund to Lyman series | |
| 28. |
An electron has a |
| A. | negligible mass |
| B. | relative charge of -1 |
| C. | the charge is opposite and equal to a proton |
| D. | all of these |
| Answer» E. | |
| 29. |
Value of Z for hydrogen atom is actually |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 30. |
Number of electrons is highest in |
| A. | He |
| B. | Ar |
| C. | Kr |
| D. | Ne |
| Answer» D. Ne | |
| 31. |
Distance between two adjacent crests or troughs is called |
| A. | wave number |
| B. | frequency |
| C. | wave length |
| D. | radiation |
| Answer» D. radiation | |
| 32. |
Balmer series were discovered in |
| A. | 1867 |
| B. | 1887 |
| C. | 1789 |
| D. | 1901 |
| Answer» C. 1789 | |
| 33. |
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 | |
| 34. |
Value of 'm' depends upon values of |
| A. | s |
| B. | l |
| C. | d |
| D. | f |
| Answer» C. d | |
| 35. |
X107 is for |
| A. | Planck's constant |
| B. | Boltzmann constant |
| C. | Rutherford constant |
| D. | Rydberg constant |
| Answer» E. | |
| 36. |
Electrodes used in Millikan drop method is used to |
| A. | generate electricity |
| B. | generate pressure |
| C. | increasing volume |
| D. | increasing density |
| Answer» B. generate pressure | |
| 37. |
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 | |
| 38. |
Schrodinger worked on |
| A. | particle theory |
| B. | wave theory |
| C. | energy theory |
| D. | kinetic energy |
| Answer» C. energy theory | |
| 39. |
In 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 | |
| 40. |
Wavelength of green color is |
| A. | 480-550nm |
| B. | 300-900nm |
| C. | 789-900nm |
| D. | 600-789nm |
| Answer» B. 300-900nm | |
| 41. |
Energy is absorbed by body in form of |
| A. | photons |
| B. | quantas |
| C. | waves |
| D. | energy |
| Answer» C. waves | |
| 42. |
If nucleon number of fluorine is 19, proton number will be |
| A. | 7 |
| B. | 15 |
| C. | 18 |
| D. | 19 |
| Answer» E. | |
| 43. |
According to Rutherford atomic model on whole atom |
| A. | has positive charge |
| B. | has negative charge |
| C. | is neutral |
| D. | is heavy |
| Answer» D. is heavy | |
| 44. |
Work done is actually product of force and |
| A. | distance |
| B. | density |
| C. | volume |
| D. | pressure |
| Answer» B. density | |
| 45. |
Full shell of valence electrons make |
| A. | metals |
| B. | non metals |
| C. | inert gases unreactive |
| D. | isotopes |
| Answer» D. isotopes | |
| 46. |
Subtracting proton number from nucleon number, |
| A. | number of electrons can be obtained |
| B. | number of neutrons can be obtained |
| C. | the nature of bonding can be determined |
| D. | the polarization can be determined |
| Answer» C. the nature of bonding can be determined | |
| 47. |
Value of waves produced by macroscopic particles is |
| A. | large |
| B. | moderate |
| C. | very small |
| D. | extra large |
| Answer» D. extra large | |
| 48. |
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 | |
| 49. |
All are noble gases except |
| A. | Helium |
| B. | Neon |
| C. | Argon |
| D. | Xeon |
| Answer» B. Neon | |
| 50. |
First element in periodic table to have 8 valence electrons is |
| A. | nitrogen |
| B. | oxygen |
| C. | fluorine |
| D. | neon |
| Answer» E. | |