Tag: environment pollution

Questions Related to environment pollution

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

Show answer
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

Show answer
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

Show answer
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)

Show answer
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)

Show answer
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. $NO$

Show answer
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.

The introduction of contaminants into the natural environment that cause adverse change is called ________.

economics environment pollution introduction to environmental pollution introduction to pollution environment and pollution

  1. Pollution

  2. Emission

  3. Greenhouse effect

  4. None of above

Show answer
Correct Option: A
Explanation:

Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light.


Hence, te correct option is $\text{A}$

The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water, is called ________

economics environment pollution introduction to environmental pollution introduction to pollution environment and pollution

  1. BOD

  2. ABE

  3. COD

  4. Standard amount of oxygen

Show answer
Correct Option: A
Explanation:

The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called Biochemical Oxygen Demand(BOD)
                             
The amount of BOD in the water is a measure of the amount of organic material in the water, in terms of how much oxygen will be required to break it down biologically.

Which of the following is a pollutant?

economics environment pollution introduction to environmental pollution introduction to pollution environment and pollution

  1. Sooty particle

  2. Sulpur-dioxide

  3. Carbon-monoxide

  4. All of above.

Show answer
Correct Option: D
Explanation:

Pollutant is a substance that pollutes something, especially water or the atmosphere.
Examples are particulate matter (Sooty particles that are most toxic when they are small),sulphur dioxide,carbon-monoxide etc.

Those gases or particles that are pumped into the air to make it unclean are called ______.

economics environment pollution introduction to environmental pollution introduction to pollution environment and pollution

  1. primary air pollutant

  2. secondary air pollutant

  3. teritiary air pollutant

  4. none of above

Show answer
Correct Option: A
Explanation:

Primary pollutants are those gases or particles that are pumped into the air to make it unclean. They include carbon monoxide from automobile (cars) exhausts and sulphur dioxide from the combustion of coal.