Tag: air and air pollution

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Questions Related to air and air pollution

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Which of the following is not correctly matched?

  1. Water pollution - using synthetic detergents for washing clothes

  2. Photochemical smog - releasing gases produced by automobiles and factories

  3. Damaging ozone layer -using CFCS

  4. Acid rain - releasing pesticides and fertilizers in water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The main component of acid rain are sulphuric acid, nitric acid and carbonic acid that are present in atmosphere due to cars and industries and factory waste. Human actions like using detergent, releasing pesticides and fertilizers in water lead to acid rain.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Mark the example which in not correctly matched?

  1. Air pollutants - Oxides of sulphur, nitrogen and carbon

  2. Particulate pollutants - Dust, mist fumes

  3. Global warming - Methane, ozone, CFCs

  4. Water soluble chemical pollutants - Oxides of nitrogen, carbon and sodium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water-soluble pollutants are detergents, fertilizers, oils from factories and industries, ammonical nitrogen etc. Whereas oxides of nitrogen, carbon, and sodium are air pollutants that cause gaseous pollution. 

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Region/regions of the atmosphere where temperature decreases with altitude is/are:

  1. thermosphere

  2. stratosphere

  3. troposphere

  4. ozonosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The temperature decreases with the altitude (height) in the lowest 10-20km of the atmosphere called the Troposphere because most of the solar radiation passes through the atmosphere with little or no effect.  That radiation is observed by the solid earth surface and is transferred to the air above the surface by conduction.
Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Match the column I with column II and mark the appropriate choice.

Column I Column II
(A) Peroxyacetyl nitrate (i) Global warming
(B) Polychlorinated biphenyls (ii) Photochemical smog
(C) Dioxides of carbon and sulphur (iii) Water pollutant
(D) IR active molecules (iv) Acid rain
  1. (A) $\rightarrow$ (ii), (B) $\rightarrow$ (iii), (C) $\rightarrow$ (iv), (D) $\rightarrow$ (i)
  2. (A) $\rightarrow$ (iii), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (ii), (D) $\rightarrow$ (i)
  3. (A) $\rightarrow$ (iv), (B) $\rightarrow$ (ii), (C) $\rightarrow$ (iii), (D) $\rightarrow$ (i)
  4. (A) $\rightarrow$ (i), (B) $\rightarrow$ (iii), (C) $\rightarrow$ (ii), (D) $\rightarrow$ (iv)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Peroxyacetyl nitrate is a secondary pollutant since they form in the atmosphere after the emission of primary pollutants. It is present in photochemical smog.

Surface water getting contaminated with PCB waste generally has high levels of PCBs in sediment, as the PCBs attach to organic matter. PCBs can be slowly released from the sediment into the water and evaporate into the air.

Sulfur dioxide another toxic chemical gas when combines with water and air, forms sulfuric acid, which is the main component of acid rain. Carbon dioxide in the air can dissolve in rainwater to form carbonic acid, $H _{2}CO _{3}$ and contributes to acid rain.

IR active molecules in the atmosphere can increase their vibrational energy by absorbing some of this infrared light, and thus increasing the temperature of the atmosphere resulting in Global warming.

The correct option is A.

Multiple choice chemistry natural resources- air, water and land acid deposition air and air pollution atmospheric pollution

Atmosphere of big cities is polluted most by :

  1. Automobile exhausts

  2. Radioactive fall out

  3. Household waste

  4. Pesticide residue
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The main source of pollution in metro cities is automobile exhausts. 


As greater the city, more the population which uses private transport.


Hence, increase in pollution is caused by automobile exhausts.


Therefore, option A is correct.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Acid rain is due to :

  1. Combination of oxides of sulphur with rain water

  2. Combination of oxides of nitrogen with rain water
  3. Formation of $H _{2}SO _{4}$ and $HNO _{3}$

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When gases like $NO _2$ and $SO _3$ go into the atmosphere and react with water and form $H _2SO _4$ and $HNO _3$, these acids come along with rain water and hence it is known as acid rain.