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Question

Match the List-I and List-II. Identify the correct answer from the code given below :
 

List-I (Aerosol)List-II (Source)
(a) Primary natural aerosol(i) Organic matter from biogenic gases
(b) Secondary natural aerosol(ii) Soot from biomass burning
(c) Primary anthropogenic aerosol(iii) Sulphate aerosol from powerplant So$_2$ emissions  
(d) Secondary anthropogenic aerosol    (iv) Soil dust


Code :

The correct answer is
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

Aerosol Classification

This question involves matching aerosols with their sources, classifying them by origin (natural/anthropogenic) and formation process (primary/secondary).

Source Matching Definitions

Primary natural aerosols are emitted directly from natural sources, such as soil dust.

Secondary natural aerosols form from natural precursor gases, like organic matter from biogenic gases.

Primary anthropogenic aerosols are emitted directly from human activities, such as soot from biomass burning.

Secondary anthropogenic aerosols form from human-released precursor gases, like sulphate aerosols from powerplant SO$_2$ emissions.

Detailed Aerosol-Source Pairs

The correct matches between List-I (Aerosol) and List-II (Source) are:

  • (a) Primary natural aerosol corresponds to (iv) Soil dust.
  • (b) Secondary natural aerosol corresponds to (i) Organic matter from biogenic gases.
  • (c) Primary anthropogenic aerosol corresponds to (ii) Soot from biomass burning.
  • (d) Secondary anthropogenic aerosol corresponds to (iii) Sulphate aerosol from powerplant SO$_2$ emissions.

Correct Code Identification

These pairings result in the code (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii), confirming the correct answer.

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Important Questions from Atmosphere

  1. Which of the following statements with reference to Surface inversion of temperature is/are correct? 1. It causes instability in the lower layers of the atmosphere. 2. This inversion commonly lasts for a few hours until the Sun comes up.

  2. Identify the cloud on the basis of the following characteristics: I. They look like cotton wool. II. They exist in patches and have flat base. III. They are generally formed at a height of 4 to 7 km.

  3. Which of the following statements with reference to Surface inversion of temperature is/are correct? 
    1. It causes instability in the lower layers of the atmosphere. 
    2. This inversion commonly lasts for a few hours until the Sun comes up.

  4. Identify the cloud on the basis of the following characteristics: 
    I. They look like cotton wool. 
    II. They exist in patches and have flat base. 
    III. They are generally formed at a height of 4 to 7 km.

  5. Given below are two statements :

    Statement (I): Atmospheric stability is important because it determines the ability of pollutants to disperse vertically in the atmosphere.

    Statement (II): In summer season in India. the atmosphere is generally stable.

    In the light of the above statements, choose the correct answer from the options given 

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