Tag: air

Questions Related to air

The medium which is effected by a pollutants is called________.

chemistry air environment and pollution environment pollution for a pollution free nature

  1. receptor

  2. sink

  3. both $A$ and $B$

  4. system

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Correct Option: A
Explanation:

The medium which is effected by pollutants is called as receptor.
Hence option A is correct.

Natural source of pollution is:

chemistry air environment and pollution environment pollution for a pollution free nature

  1. rain forest

  2. mining of minerals

  3. forest fire

  4. falling of meteoroids

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Correct Option: C
Explanation:

Forest fires are one of the main natural sources of pollution. The forests catch fire due to high temperature in summers

Which of the following is not regarded as a pollutant?

chemistry air environment and pollution environment pollution for a pollution free nature

  1. $NO _{2}$

  2. $CO _{2}$

  3. $SO _{2}$

  4. CO

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Correct Option: B
Explanation:

Pollutants can be classified as solid, gaseous or liquid pollutants. Also, it can be classified as physical, chemical and biological. They can be further classified as degradable and non-degradable. $NO _2$, $SO _2$  and CO are gases which if present in great quantity in the atmosphere can cause pollution.

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

Column I Column II
(A) Biodegradable pollutants (i) DDT
(B) Non-biodegradable pollutants (ii) $SO _{2}$
(C) Primary pollutants (iii) PAN
(D) Secondary pollutants (iv) Sewage
chemistry air environment and pollution environment pollution for a pollution free nature

  1. (A) $\rightarrow$ (iii), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (ii), (D) $\rightarrow$ (i)

  2. (A) $\rightarrow$ (ii), (B) $\rightarrow$ (iii), (C) $\rightarrow$ (iv), (D) $\rightarrow$ (i)

  3. (A) $\rightarrow$ (i), (B) $\rightarrow$ (ii), (C) $\rightarrow$ (iii), (D) $\rightarrow$ (iv)

  4. (A) $\rightarrow$ (iv), (B) $\rightarrow$ (i), (C) $\rightarrow$ (ii), (D) $\rightarrow$ (iii)

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Correct Option: D
Explanation:

Sewage is a biodegradable pollutant which can be degraded. DDT is a type of non biodegradable pollutant. $ S0 _2 $ is a primary pollutant, affecting the environment. PAN is considered as a secondary pollutants among all the pollutants. 

Match the upper limit concentration of the pollutants given in column I with column II and mark the appropriate choice.

Column I Column II
(A) Lead (i) 500 ppm
(B) Sulphate (ii) 10 ppm
(C) Nitrate (iii) 50 ppb
(D) Fluoride (iv) 50 ppm
chemistry air environment and pollution environment pollution for a pollution free nature

  1. (A) $\rightarrow$ (ii), (B) $\rightarrow$ (iii), (C) $\rightarrow$ (i), (D) $\rightarrow$ (iv)

  2. (A) $\rightarrow$ (iii), (B) $\rightarrow$ (i), (C) $\rightarrow$ (iv), (D) $\rightarrow$ (ii)

  3. (A) $\rightarrow$ (i), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (iii), (D) $\rightarrow$ (ii)

  4. (A) $\rightarrow$ (iv), (B) $\rightarrow$ (ii), (C) $\rightarrow$ (iii), (D) $\rightarrow$ (i)

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Correct Option: B
Explanation:

The concentration of pollutants like lead is 50 ppb. So the water gets contaminated with lead. The concentration of sulphate is 500 ppm. The concentration of nitrate is 50 ppm. Concentration of fluoride is 10 ppm. 

The pollutants which come directly in the air from sources are called primary pollutants. Primary pollutants. Which of the following belongs to secondary air pollutants? 

chemistry air environment and pollution environment pollution for a pollution free nature

  1. $CO$

  2. $Hydrocarbon$

  3. $Peroxyacetyle\ nitrate\ (PAN)$

  4. $NO$

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Correct Option: D
Explanation:
The correct answer is NO (nitrogen oxide) which reacts with oxygen to form nitrogen dioxide, participate in a complex of ultraviolet-driven photochemical reactions. and it also forms acid rain when it reacts with water.