Tag: for a pollution free nature

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Questions Related to for a pollution free nature

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

Which of the following is not regarded as a pollutant?

  1. $NO _{2}$
  2. $CO _{2}$
  3. $SO _{2}$

  4. CO
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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
  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)
Reveal answer Fill a bubble to check yourself
D Correct answer
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. 

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

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
  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)
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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? 

  1. $CO$
  2. $Hydrocarbon$
  3. $Peroxyacetyle\ nitrate\ (PAN)$
  4. $NO$
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice chemistry water too little to waste effects and conservation of water pollution water pollution, its effects and cures for a pollution free nature

Industrial or man-made concentrations of naturally occurring substances, such as_____ and _____ have also been identified as health hazards in soil and groundwater.

  1. Carbon and ammonia

  2. Ammonia and nitrates

  3. Oxides and ammonia

  4. Carbon and nitrates
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Industrial or man-made concentrations of naturally occurring substances, such as nitrate and ammonia associated with livestock manure from agricultural operations, have also been identified as health hazards in soil and groundwater.

Multiple choice chemistry water too little to waste effects and conservation of water pollution water pollution, its effects and cures for a pollution free nature

Chronic exposure to ______ at sufficient concentrations is known to be associated with higher incidence of leukemia.

  1. sodium

  2. benzene

  3. methane

  4. all of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Contaminated or polluted soil directly affects human health through direct contact with soil, or via inhalation of soil contaminants which have vaporized. Chronic exposure to benzene at sufficient concentrations is known to be associated with higher incidence of leukemia.