Online Home Assignment Of B.Sc. Sy Envi.Science Hjp Mahavidyalaya, H.Nagar

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Online Home Assignment Of B.Sc. Sy Envi.Science Hjp Mahavidyalaya, H.Nagar - Quiz

Dear Students,
This is Mr Ashish A. Divde,
Assistant professor & Head
Department of Environmental Science
Hutatma Jaywantrao Patil Mahavidyalaya
Himayatnagar.
I recently created this amazing quiz assignment for B. Sc. Second year students, Take this quiz and try to solve in 30 minutes. This practice will definitely boost and enthusiasm to "Stay at Home and be prepare for upcoming examination.


Questions and Answers
  • 1. 

    Secondary air pollutant is 

    • A. 

      Ozone

    • B. 

      Carbon monoxide

    • C. 

      Nitrogen Dioxide

    • D. 

      Sulphur dioxide

    Correct Answer
    A. Ozone
    Explanation
    Ozone is considered a secondary air pollutant because it is not directly emitted into the atmosphere. Instead, it is formed through a chemical reaction between nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the presence of sunlight. Ozone is a harmful pollutant that can cause respiratory problems, especially for individuals with pre-existing conditions such as asthma. It is also a major component of smog, which can have negative impacts on both human health and the environment.

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  • 2. 

    SMOG is derived from

    • A. 

      Smoke

    • B. 

      Fog

    • C. 

      Both Smoke and Fog

    • D. 

      Only Smoke

    Correct Answer
    C. Both Smoke and Fog
    Explanation
    SMOG is derived from both smoke and fog. SMOG is a type of air pollution that occurs when smoke and fog combine. Smoke, which is released from burning fossil fuels, industrial processes, or wildfires, contains particles and pollutants. Fog, on the other hand, is a weather condition characterized by low-lying clouds that form near the ground. When smoke and fog mix together, the pollutants from the smoke get trapped in the fog, creating SMOG. This combination of smoke and fog can have harmful effects on air quality and human health.

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  • 3. 

    What is Air Quality Index?

    • A. 

      It tells about the sound pollution

    • B. 

      It measures ozone level in your area

    • C. 

      It checks the color of the air

    • D. 

      It measures air pollution mainly sulphur content in the air

    Correct Answer
    B. It measures ozone level in your area
    Explanation
    The Air Quality Index (AQI) is a measure of the level of pollutants in the air, including ozone. It provides information about the air quality in a specific area, indicating whether the air is polluted or clean. The AQI takes into account various pollutants, such as sulphur content, and provides a numerical value or color code to represent the air quality. Therefore, the statement that the AQI measures ozone level in your area is correct.

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  • 4. 

    Which of the following is an organic gas?

    • A. 

      Hydrocarbon

    • B. 

      Aldehydes

    • C. 

      Ammonia

    • D. 

      Ketones

    Correct Answer
    C. Ammonia
    Explanation
    Ammonia is the correct answer because it is an organic gas. Organic gases are compounds that contain carbon and hydrogen atoms, and ammonia (NH3) fits this definition. It is composed of nitrogen and hydrogen atoms bonded together, and it is commonly used in various industrial applications. Hydrocarbons, aldehydes, and ketones also contain carbon and hydrogen atoms, but they are not gases at room temperature and pressure.

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  • 5. 

    Which of the following leads to a disease bronchitis?

    • A. 

      SO2

    • B. 

      SO3

    • C. 

      SO4

    • D. 

      CO2

    Correct Answer
    B. SO3
    Explanation
    SO3 leads to bronchitis because it is a highly reactive gas that can irritate and inflame the bronchial tubes in the lungs. When SO3 is inhaled, it reacts with water in the respiratory system to form sulfuric acid, which damages the lining of the bronchial tubes and causes inflammation. This inflammation can lead to symptoms such as coughing, wheezing, and difficulty breathing, characteristic of bronchitis.

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  • 6. 

    Which of the following gases has the highest affinity for blood haemoglobin?

    • A. 

      Carbon dioxide

    • B. 

      Oxygen

    • C. 

      Nitrogen

    • D. 

      Carbon monoxide

    Correct Answer
    D. Carbon monoxide
    Explanation
    Carbon monoxide has the highest affinity for blood haemoglobin compared to the other gases listed. This is because carbon monoxide binds to haemoglobin with a much higher affinity than oxygen, making it difficult for oxygen to bind and be transported throughout the body. This can lead to carbon monoxide poisoning, as the body is unable to effectively transport oxygen to vital organs.

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  • 7. 

    Which are the most significant air-borne allergens?

    • A. 

      Fungi

    • B. 

      Soot

    • C. 

      Pollen

    • D. 

      All of these

    Correct Answer
    C. Pollen
    Explanation
    Pollen is the correct answer because it is a common airborne allergen that can cause allergic reactions in many individuals. Pollen is released by plants during their reproductive process and can be carried by the wind over long distances. When people with allergies inhale pollen, their immune system may overreact, leading to symptoms such as sneezing, itching, and congestion. Therefore, pollen is considered one of the most significant airborne allergens that can trigger allergic reactions in susceptible individuals.

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  • 8. 

    Which of the following is responsible for black spots on Taj Mahal?

    • A. 

      Nitrogen dioxide

    • B. 

      Sulphur

    • C. 

      Chlorine

    • D. 

      Sulphur dioxide

    Correct Answer
    D. Sulphur dioxide
    Explanation
    Sulphur dioxide is responsible for the black spots on the Taj Mahal. When sulphur dioxide combines with moisture in the air, it forms sulphuric acid. This acid reacts with the marble surface of the Taj Mahal, causing it to deteriorate and form black spots. Sulphur dioxide is released into the atmosphere from industrial emissions, vehicle exhaust, and burning of fossil fuels. The high levels of pollution in the surrounding areas contribute to the accumulation of sulphur dioxide, leading to the degradation of the iconic monument.

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  • 9. 

    Ozone is formed in upper atmosphere by a photo chemical reaction with

    • A. 

      Ultra violet solar radiation

    • B. 

      Infra red radiation

    • C. 

      Visible light

    • D. 

      All of the above

    Correct Answer
    A. Ultra violet solar radiation
    Explanation
    Ozone is formed in the upper atmosphere through a photochemical reaction, which is initiated by ultra violet solar radiation. This radiation breaks apart oxygen molecules (O2), and the resulting oxygen atoms (O) then react with other oxygen molecules to form ozone (O3). Infra red radiation and visible light do not have enough energy to initiate this reaction, so they do not play a significant role in ozone formation. Therefore, the correct answer is ultra violet solar radiation.

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  • 10. 

    The major source for Carbon monoxide is

    • A. 

      Motor vehicle

    • B. 

      Industrial process

    • C. 

      Stationary fuel combustion

    • D. 

      None of the above

    Correct Answer
    A. Motor vehicle
    Explanation
    Motor vehicles are a major source of carbon monoxide emissions due to the incomplete combustion of gasoline or diesel fuel in their engines. This incomplete combustion occurs when there is not enough oxygen present for the fuel to burn completely, resulting in the production of carbon monoxide. Industrial processes and stationary fuel combustion can also contribute to carbon monoxide emissions, but motor vehicles are a significant source due to the large number of vehicles on the road emitting carbon monoxide on a daily basis.

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  • 11. 

    Which gas is mainly produced due to incomplete burning of wood?

    • A. 

      CO

    • B. 

      SO2

    • C. 

      NO2

    • D. 

      NO3

    Correct Answer
    A. CO
    Explanation
    Incomplete burning of wood results in the production of carbon monoxide (CO). This occurs when there is not enough oxygen present during the combustion process. Carbon monoxide is a colorless, odorless gas that is highly toxic and can be deadly if inhaled in high concentrations. It is important to ensure proper ventilation and complete combustion when burning wood to minimize the production of carbon monoxide.

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  • 12. 

    At what concentration can the taste and smell of sulphur dioxide be detected?

    • A. 

      1000-2000 ppm

    • B. 

      11-30 ppm

    • C. 

      500-700 ppm

    • D. 

      0.1-0.3 ppm

    Correct Answer
    D. 0.1-0.3 ppm
    Explanation
    Sulphur dioxide is a gas with a strong, pungent odor. It can be detected at very low concentrations due to its distinct smell and taste. The answer of 0.1-0.3 ppm suggests that even at these low levels, the presence of sulphur dioxide can be detected by humans. This indicates that individuals have a high sensitivity to the smell and taste of sulphur dioxide, allowing them to detect it even in very small amounts.

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  • 13. 

    Which is the major source for sulphur dioxide?

    • A. 

      Volcanic eruption

    • B. 

      Burning of petrol

    • C. 

      Sewage treatment process

    • D. 

      Coal and crude oil combustion

    Correct Answer
    D. Coal and crude oil combustion
    Explanation
    Coal and crude oil combustion is the major source for sulphur dioxide. When coal and crude oil are burned, they release sulphur dioxide into the atmosphere. This occurs because these fossil fuels contain sulfur compounds, which are converted to sulphur dioxide during combustion. This pollutant is a significant contributor to air pollution and can have harmful effects on human health and the environment.

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  • 14. 

    The minimum size of smoke particle is

    • A. 

      1 μm

    • B. 

      0.8 μm

    • C. 

      0.5 μm

    • D. 

      0.2 μm

    Correct Answer
    C. 0.5 μm
    Explanation
    The correct answer is 0.5 μm. Smoke particles can vary in size, but the minimum size is generally considered to be 0.5 μm. This means that there can be smoke particles that are smaller than 0.5 μm, but 0.5 μm is the smallest size that is typically associated with smoke particles.

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  • 15. 

    Which of the following is a secondary air pollutant?

    • A. 

      SPM

    • B. 

      PAN

    • C. 

      SO2

    • D. 

      NO2

    Correct Answer
    B. PAN
    Explanation
    PAN (peroxyacetyl nitrate) is a secondary air pollutant. It is formed in the atmosphere through a complex series of reactions involving volatile organic compounds (VOCs), nitrogen oxides (NOx), and sunlight. PAN is harmful to human health and the environment, causing respiratory issues and contributing to the formation of smog. It is considered a secondary pollutant because it is not directly emitted into the atmosphere but is formed through chemical reactions involving primary pollutants like NOx and VOCs.

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  • 16. 

    The permissible concentration of PM  10 in the air is

    • A. 

      60 μg/m3

    • B. 

      40 μg/m3

    • C. 

      50 μg/m3

    • D. 

      20 μg/m3

    Correct Answer
    A. 60 μg/m3
    Explanation
    The correct answer is 60 μg/m3. This is the permissible concentration of PM 10 in the air. PM 10 refers to particulate matter with a diameter of 10 micrometers or less. The permissible concentration is the maximum level of PM 10 that is considered safe for human health and the environment. This limit is set to protect against the harmful effects of air pollution and to maintain good air quality.

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  • 17. 

    Which of the following is/are inorganic gas?

    • A. 

      Hydrogen sulphide

    • B. 

      Carbon monoxide

    • C. 

      Chlorine

    • D. 

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    All of the given options, hydrogen sulphide, carbon monoxide, and chlorine, are inorganic gases. Inorganic gases are compounds that do not contain carbon-hydrogen (C-H) bonds. Hydrogen sulphide (H2S) is a colorless gas with a strong odor, carbon monoxide (CO) is a colorless and odorless gas, and chlorine (Cl2) is a greenish-yellow gas. These gases are all considered inorganic because they do not contain carbon-hydrogen bonds in their molecular structure.

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  • 18. 

    'Ozone' in stratosphere absorbs harmful

    • A. 

      Dust particles

    • B. 

      Radiations

    • C. 

      Fumes

    • D. 

      Air pollutants

    Correct Answer
    B. Radiations
    Explanation
    Ozone in the stratosphere acts as a protective layer that absorbs harmful radiations from the sun. These radiations, such as ultraviolet (UV) rays, can be detrimental to living organisms and cause various health issues, including skin cancer and cataracts. Therefore, the presence of ozone in the stratosphere is crucial in shielding the Earth's surface from these harmful radiations.

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  • 19. 

    Which of the following is the major photochemical smog?

    • A. 

      PAN

    • B. 

      Smog

    • C. 

      Chlorofluorocarbon

    • D. 

      Hydrogen peroxide

    Correct Answer
    C. Chlorofluorocarbon
    Explanation
    Chlorofluorocarbon (CFC) is the major photochemical smog because it is a group of chemicals that are released into the atmosphere through human activities such as industrial processes and the use of aerosol propellants. When CFCs react with sunlight, they undergo photochemical reactions that produce smog. This smog contains harmful pollutants such as ozone, which can have negative effects on human health and the environment. PAN (peroxyacyl nitrates), although also involved in the formation of smog, is not as major as CFCs in contributing to photochemical smog.

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  • 20. 

    Which of the following is a liquid form of aerosol?

    • A. 

      Fume

    • B. 

      Dust

    • C. 

      Mist

    • D. 

      Smoke

    Correct Answer
    C. Mist
    Explanation
    A mist is a liquid form of aerosol. It consists of tiny droplets of liquid suspended in the air. Mist is often formed when water evaporates and condenses into small droplets, creating a cloud-like appearance. It is commonly seen in nature, such as in fog or when waterfalls create a fine spray. Mist can also be artificially created, for example, through the use of misting machines or sprayers. It is different from fume, dust, and smoke, which are all forms of aerosols but not in liquid form.

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