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 n+l value of 3d orbital is |
| A. | 8 |
| B. | 2 |
| C. | 5 |
| D. | 3 |
| Answer» D. 3 | |
| 2. |
Atomic model is |
| A. | flat |
| B. | not flat |
| C. | in one plane |
| D. | in one dimension |
| Answer» C. in one plane | |
| 3. |
The p-sub shell have shape of |
| A. | dumb-bell |
| B. | pendulum |
| C. | complicated |
| D. | none |
| Answer» B. pendulum | |
| 4. |
The speed of the electron is faster in |
| A. | smaller orbits |
| B. | larger orbits |
| C. | middle orbits |
| D. | speed remains same |
| Answer» B. larger orbits | |
| 5. |
Proton is a smallest particle which is obtained from |
| A. | nitrogen |
| B. | oxygen |
| C. | hydrogen |
| D. | gold plate |
| Answer» D. gold plate | |
| 6. |
The positive rays are produced by |
| A. | molecules |
| B. | gas atoms |
| C. | solids |
| D. | liquids |
| Answer» C. solids | |
| 7. |
The spectrum of different colored lines is characteristic of |
| A. | sodium |
| B. | potassium |
| C. | hydrogen |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 8. |
Blue color has wavelength between |
| A. | 400-900nm |
| B. | 430-480nm |
| C. | 500-600nm |
| D. | 200-300nm |
| Answer» C. 500-600nm | |
| 9. |
In Millikan oil drop method the spray of oil droplets is produced by |
| A. | atomizer |
| B. | sprayer |
| C. | oil pack |
| D. | none |
| Answer» B. sprayer | |
| 10. |
The energy of electron -52.53kilo joule per mole is for |
| A. | first orbit of hydrogen |
| B. | second orbit of hydrogen |
| C. | third orbit of hydrogen |
| D. | fifth orbit of hydrogen |
| Answer» E. | |
| 11. |
The wavelength of X rays produced is dependent upon |
| A. | volume of material |
| B. | density of material |
| C. | nature of material |
| D. | glass |
| Answer» D. glass | |
| 12. |
The electron is lighter than proton about |
| A. | 1890 times |
| B. | 1836 times |
| C. | 1790 times |
| D. | 1678 times |
| Answer» C. 1790 times | |
| 13. |
The color of fluorescence produced by cathode rays in glass tube is |
| A. | purplish |
| B. | greenish |
| C. | maroon |
| D. | yellow |
| Answer» C. maroon | |
| 14. |
Ha line is further divided into |
| A. | four lines |
| B. | three lines |
| C. | five lines |
| D. | two lines |
| Answer» D. two lines | |
| 15. |
e/m value of electrons comes out to be |
| A. | x1011 |
| B. | x1011 |
| C. | x1011 |
| D. | x1011 |
| Answer» B. x1011 | |
| 16. |
Millikan oil drop method was discovered in |
| A. | 1980 |
| B. | 1909 |
| C. | 1930 |
| D. | 1967 |
| Answer» C. 1930 | |
| 17. |
The chamber used in Millikan oil drop method has |
| A. | three parts |
| B. | two parts |
| C. | five parts |
| D. | seven parts |
| Answer» C. five parts | |
| 18. |
The unit used for measuring wavelength is |
| A. | angstrom |
| B. | centimeter |
| C. | meter |
| D. | millimeter |
| Answer» B. centimeter | |
| 19. |
Cathode rays produced yellow fluorescence when strike |
| A. | alumina |
| B. | sodium |
| C. | tin stone |
| D. | potassium chromate |
| Answer» D. potassium chromate | |
| 20. |
The quantum theory was explained to show behavior of |
| A. | energy |
| B. | radiation |
| C. | density |
| D. | volume |
| Answer» C. density | |
| 21. |
The noble prize was awarded to Chadwick in the year |
| A. | 1934 |
| B. | 1930 |
| C. | 1920 |
| D. | 1935 |
| Answer» E. | |
| 22. |
The atoms which have same number of protons but different number of neutrons are called |
| A. | isomers |
| B. | isotopes |
| C. | none |
| D. | spectators |
| Answer» C. none | |
| 23. |
The 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 | |
| 24. |
The visible spectrum has |
| A. | six colors |
| B. | five colors |
| C. | seven colors |
| D. | nine colors |
| Answer» D. nine colors | |
| 25. |
Wave packets are form of |
| A. | light |
| B. | energy |
| C. | volume |
| D. | waves |
| Answer» C. volume | |
| 26. |
The chamber in Millikan oil drop method is filled with |
| A. | air |
| B. | gas atoms |
| C. | oil |
| D. | pressure |
| Answer» B. gas atoms | |
| 27. |
The value of azimuthal quantum number starts from |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 28. |
The character of p-orbital which determines the geometry of molecules is |
| A. | non directional |
| B. | directional |
| C. | vertical |
| D. | horizontal |
| Answer» C. vertical | |
| 29. |
The flashes are produced by positive rays on |
| A. | ZnS plate |
| B. | Sulphur plate |
| C. | diamond plate |
| D. | gold plate |
| Answer» B. Sulphur plate | |
| 30. |
The existence of neutron was predicted by Rutherford in year |
| A. | 1920 |
| B. | 1980 |
| C. | 1900 |
| D. | 1970 |
| Answer» B. 1980 | |