MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Aerosols contribute to global warming. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
What type of colloid is an aerosol? |
| A. | Solid in gas |
| B. | Gas in solid or fluid |
| C. | Fluid in gas |
| D. | Fluid or solid in gas |
| Answer» E. | |
| 3. |
What does CNC stand for in the context of aerosol particles? |
| A. | Cloudy nucleic condensation |
| B. | Condensation nucleus counter |
| C. | Chemical nucleic coagulation |
| D. | Cloudy nucleic coagulation |
| Answer» C. Chemical nucleic coagulation | |
| 4. |
What is/are the inertial method(s) used to measure size of aerosol particles? |
| A. | Particle acceleration method |
| B. | Pulsation method |
| C. | Multi cyclone |
| D. | All of the mentioned |
| Answer» E. | |
| 5. |
When light is passed through a suspension, it’s intensity decreases due to _________ |
| A. | Both scattering and diffraction |
| B. | Both diffraction and absorption |
| C. | Absorption only |
| D. | Both scattering and absorption |
| Answer» E. | |
| 6. |
The movement of particles from region of lower vapour to high vapour molecule concentration is known as diffusiophoresis. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
The size of aerosol particles formed mechanically is minimum 1 micron. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
WHAT_DOES_CNC_STAND_FOR_IN_THE_CONTEXT_OF_AEROSOL_PARTICLES??$ |
| A. | Cloudy nucleic condensation |
| B. | Condensation nucleus counter |
| C. | Chemical nucleic coagulation |
| D. | Cloudy nucleic coagulation |
| Answer» C. Chemical nucleic coagulation | |
| 9. |
WHAT_IS/ARE_THE_INERTIAL_METHOD(S)_USED_TO_MEASURE_SIZE_OF_AEROSOL_PARTICLES??$ |
| A. | Particle acceleration method |
| B. | Pulsation method |
| C. | Multi cyclone |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
Aerosols contribute to global warming.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
What type of colloid is an aerosol?$ |
| A. | Solid in gas |
| B. | Gas in solid or fluid |
| C. | Fluid in gas |
| D. | Fluid or solid in gas |
| Answer» E. | |
| 12. |
What does the aerodynamic diameter of an aerosol indicate? |
| A. | Size of the aerosol particle when floating in air |
| B. | Equivalent diameter of a sphere having same volume as that of the aerosol |
| C. | Average diameter of aerosol particles present in unit volume of air |
| D. | Maximum size of aerosol particle that can float in air |
| Answer» C. Average diameter of aerosol particles present in unit volume of air | |
| 13. |
What is the size of the particles categorised as aerosols? |
| A. | Greater than 1 micron |
| B. | Less than 1 micron |
| C. | Between 0.01-1 micron |
| D. | Less than 0.01 micron |
| Answer» D. Less than 0.01 micron | |
| 14. |
When light is passed through a suspension, it’s intensity decreases due to ________?# |
| A. | Both scattering and diffraction |
| B. | Both diffraction and absorption |
| C. | Absorption only |
| D. | Both scattering and absorption |
| Answer» E. | |
| 15. |
Which of the following scattering phenomena is responsible for the blue colour of the sky? |
| A. | Mie scattering |
| B. | Diffraction |
| C. | Rayleigh scattering |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 16. |
The movement of particles from region of lower vapour to high vapour molecule concentration is known as diffusiophoresis. |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
Particle movement due to photophoresis depends on _________ |
| A. | Shape and size of the particle |
| B. | Optical properties of the particle |
| C. | Wavelength and intensity of incident light |
| D. | All of the mentioned |
| Answer» E. | |
| 18. |
When a given gas has a temperature gradient, the aerosol particles move from higher temperature regions to low temperature regions. This effect is known as __________ |
| A. | Photophoresis |
| B. | Diffusiophoresis |
| C. | Thermophoresis |
| D. | Diffusiophoresis or Thermophoresis |
| Answer» D. Diffusiophoresis or Thermophoresis | |
| 19. |
What is the statement of the Kelvin effect in fluid droplets? |
| A. | Vapour pressure about a droplet decreases with decrease in diameter of the droplet |
| B. | Vapour pressure about a droplet increases with decrease in diameter of the droplet |
| C. | Vapour pressure of the droplet is independent of the diameter of the droplet |
| D. | Vapour pressure of the droplet varies with the diameter of the droplet as well as the temperature |
| Answer» C. Vapour pressure of the droplet is independent of the diameter of the droplet | |
| 20. |
The size of aerosol particles formed mechanically is minimum 1 micron. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
Formation of aerosols by nucleation produces particles of size __________ |
| A. | Less than 0.1 micron |
| B. | Greater than 0.1 micron |
| C. | Less than 1 micron |
| D. | Greater than 1 micron |
| Answer» B. Greater than 0.1 micron | |