NPTEL Air Pollution and Control Week 2 Assignment Answers 2025
1. Why is albedo a significant concern in climatology?
- It influences global wind patterns
- It directly increases greenhouse gas emissions
- It reduces atmospheric oxygen levels
- A decrease in albedo increases heat absorption, causing ice to melt
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2. What happens when soot enters the atmosphere?
- It reflects sunlight, cooling the air
- It absorbs sunlight and generates heat, warming the air
- It mixes with clouds to form rain
- It increases the albedo of the Earth’s surface
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3. How does soot affect snow and ice after being deposited?
- It reduces their albedo, absorbing more sunlight
- It increases their albedo, reflecting more sunlight
- It has no significant impact on snow and ice
- It accelerates the formation of glaciers
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4. In water bodies, which gas can be depleted by eutrophication?
- CO2
- SO2
- O2
- CO
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5. Which of the following is NOT a type of marine aerosol?
- Sea salt
- Sulfate aerosol
- Mineral dust
- Methane gas
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6. What is the approximate size of jet drops compared to their precursor bubble diameter?
- 50%
- 25%
- 10%
- 5%
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7. Select the incorrect pair based on the particle size of the particulate matter.
- Dust – 1 to 200 µm
- Smoke – 0.01 to 1 µm
- Fumes – 0.1 to 1 µm
- Mist – greater than 1 µm
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8. ______________ is one of the processes of movement of gases and liquids (fluids) to transfer heat between regions of different temperatures.
- Advection
- Convection
- Diffusion
- Dispersion
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9. What is the primary role of the hydroxyl radical (OH) in the troposphere?
- Control the atmospheric lifetime of gases
- Absorb UV radiation
- Cause acid rain
- Act as a greenhouse gas
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10. Which of the following phenomena is responsible for transferring the heat energy from the tropics to the poles to create atmospheric circulation?
- Conduction
- Convection
- Advection
- Pyrolysis
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