MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Neutrally charged particles are protons. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
What s the mass of neutron in terms of electrons mass? |
| A. | 1838 times of electron s mass |
| B. | 1/1838 times of electron s mass |
| C. | 1832 times of electron s mass |
| D. | 1/1832 times of electron s mass |
| Answer» B. 1/1838 times of electron s mass | |
| 3. |
___________ is the lightest and smallest particles that s obtained from hydrogen(that is a positive ion). |
| A. | Electron |
| B. | Proton |
| C. | Neutron |
| D. | Particle |
| Answer» C. Neutron | |
| 4. |
When cathode rays strike zinc sulfide coating, what did it create? |
| A. | bright spot |
| B. | blue light |
| C. | uv rays |
| D. | white light |
| Answer» B. blue light | |
| 5. |
Thomson discovered that every substance in this universe is made up of ________ from his experiments. |
| A. | neutrons |
| B. | protons |
| C. | electrons |
| D. | mass |
| Answer» D. mass | |
| 6. |
Who did the oil drop experiment? |
| A. | R. A. Millikan |
| B. | J. J. Thomson |
| C. | Rutherford |
| D. | Galileo |
| Answer» B. J. J. Thomson | |
| 7. |
Which of the following condition is suitable for cathode ray discharge tube? |
| A. | Low pressure, high voltage |
| B. | Low pressure, low voltage |
| C. | High pressure, low voltage |
| D. | High pressure, high voltage |
| Answer» B. Low pressure, low voltage | |
| 8. |
Pick out electron s charge to mass ratio s value from the options. |
| A. | 1.758820 10<sup>11</sup> C kg<sup>-1</sup> |
| B. | 1.758820 10<sup>11</sup> C kg |
| C. | 1.758823 10<sup>11</sup> C kg |
| D. | 1.708820 10<sup>11</sup> C kg |
| Answer» B. 1.758820 10<sup>11</sup> C kg | |
| 9. |
Which of the following may be an incorrect statement regarding cathode ray discharge tube? |
| A. | Presence of negative charge in cathode rays |
| B. | The magnetic field deflects these rays |
| C. | It needs high voltage |
| D. | Protons are present in cathode rays |
| Answer» E. | |