Environmental Studies

Air Pollution

2,298 Questions

Air pollution questions address the sources of emissions, indoor air quality, and the formation of photochemical smog. You will explore the impact of particulate matter, acid rain, and urban pollutants. This is a highly relevant subject for environmental studies and general awareness tests.

Photochemical smogParticulate matter emissionsAcid rain causesIndoor air pollutionAmmonia emissions

Air Pollution Questions

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Catalytic converter used for controlling pollution is used in

  1. Thermal plants

  2. Chimneys

  3. Brick kilns

  4. Motor vehicles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The catalytic converter is used to convert toxic and harmful pollutant into less toxic emission before they are released in the atmosphere from the engine of motor vehicles. The catalytic converter works as two types- reduction catalyst and the oxidation catalyst. The catalyst is a substance that causes or accelerates a chemical reaction without being unaffected. The catalytic converter reduces carbon monoxide hydrocarbon and nitrous oxides. The reduction catalyst separates nitrogen atom out of nitrous oxides and freezes oxygen, the nitrogen atom combines with another nitrogen atoms forming Nitrogen. The oxidation catalyst reduces the carbon monoxide by oxidizing by reacting carbon monoxide with oxygen in exhaust gas forming carbon dioxide.
Hence, the correct answer is 'Motor vehicles'.
Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Gaseous pollutants are controlled through

  1. Adsorption

  2. ESP

  3. Arrestors

  4. Pyrolysis

  5. Incineration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gaseous pollutants include dust, aerosols, suspended particulate matter etc. that are removed by the principle of adsorption. Electrostatic precipitators, cyclones, scrubbers etc. are some devices that can control the gaseous pollutants. These are either made to be retained by the electrostatic field or by pressure. Pyrolisis and incineration are performed for solid pollutants. Arrestors are used to protect the types of equipment from the damaging effect of lightning.

Hence, the correct answer is 'Adsorption'.

Multiple choice zoology environmental factors soil-nature climate factors abiotic components organisms and environment

Which of the following is not properly matched?

  1. Formaldehyde- Carcinogenic

  2. Sulphur dioxide - Respiratory problems

  3. Nitrogen oxide - Brown air
  4. Mean annual temperature - $25^o$C

  5. Photochemical smog - Grey air
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mean annual temperature is calculated by subtracting the lowest recorded temperature from the highest recorded temperature of the of the day. It can vary depending on the weather and climate of an area.

A. Formaldehyde has been classified as cancer causing agent by the EPA. It has shown leukaemia incidences.
B. Sulphur dioxide is responsible for the respiratory tract diseases like asthma, bronchitis etc.
C. Nitrogen oxide is called the brown air because of the change in frequencies of absorption of light when nitrogen combines with the oxygen.
D. Mean annual temperature can vary depending on the weather and climatic conditions.
E. Photochemical smog forms grey air due to the formation of ozone and PAN that decreases the visibility.
Hence, the correct answer is 'Mean annual temperature - 25$^{o}$C'

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

A substance that pollute something is called as 

  1. Sewage

  2. Particulate

  3. Pollutant

  4. Smog
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pollutant is a substance which when introduced into the environment has undesired effects. Pollutant causes long- or short-term damage by changing the environmental factors. Some pollutants are biodegradable and therefore do not persist in the environment in the long term. However, the degradation products of some pollutants are themselves polluting such as the products DDE and DDD produced from degradation of DDT.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Pollutants in form of fine dust particles are known as

  1. Dry Deposits

  2. Wet Deposits

  3. Rain

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

Dry deposition refers to the process where fine dust particles, aerosols, and gases settle out of the atmosphere onto surfaces without the presence of precipitation.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

For which of the following PM10 and PM2.5 Samplers are used?

  1. Food adulteration

  2. Adulterated Petrol

  3. Environment Pollution

  4. Noise Pollution
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

PM10 and PM2.5 refer to particulate matter with diameters of 10 micrometers or less and 2.5 micrometers or less, respectively, which are standard metrics for measuring air pollution.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which is not a pollutant from exhaust of motor vehicle?

  1. SO$ _2$

  2. CO

  3. Fly ash

  4. Hydrocarbon gas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fly ash is produced due to the incomplete burning or combustion of the fossil fuels. The ash contains the carbon particles or flecks which are suspended in the air. The pollutants which are released from the exhaust of the motor vehicle are particulate matter, SO$ _2$, NO$ _x$, CO, etc. 

Thus, the correct answer is option C. 

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which of the following statements is true?

  1. Lichens are affected by SO$ _2$.

  2. All pollutants are not waste.

  3. Carbon monoxide is a serious pollutant.

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

Lichens are well-known bioindicators sensitive to SO2, CO is a toxic pollutant, and not all pollutants are waste (some are useful substances in the wrong place).

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Pollution indicator plants

  1. Are resistant to pollution

  2. Can purify the atmosphere

  3. Are very sensitive to pollution

  4. Are very sensitive to pollutants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pollution indicators are the agents which determine the presence of the pollutant. There is a change in the structure of the pollution indicators when there is pollutant present in the environment. The indicators are sensitive to pollution. The plants which are used as the pollution indicators show bleaching, stunting or death due to the presence of the pollutant.

Thus, the correct answer is option C. 

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

A pollutant that cause irritation in eyes, nose and throat is

  1. CO
  2. $SO _2$

  3. CFC
  4. $CH _4$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sulphur dioxide form a a very harmful gas. It is also responsible for the formation of acid rain and a potent atmospheric pollutant. People with asthma and similar bronchial conditions are at a greater risk through sulphur dioxide poisoning. It is also linked with cardio vascular diseases.

So, option B is the correct answer.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Very fine organic or inorganic particles suspended in air is known as

  1. Particulate pollutant

  2. Gaseous pollutant

  3. Aerosol

  4. Dust particle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aerosols are minute organic or inorganic particles suspended in the atmosphere. These are the colloids of solid and liquids suspended in air. Their scattering of sunlight can reduce visibility.

So, the correct answer is option C.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which of the following groups of plants can be used as indicators of S$O _2$ pollution of air?

  1. Epiphytic lichens

  2. Ferns

  3. Liver worts

  4. Horn worts
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Epiphytic lichens lack roots and absorb nutrients and water directly from the air, making them highly sensitive to air pollutants like SO2, which damages their chlorophyll.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which of the following is a weightless pollutant?

  1. Sewage and exhaust emission
  2. $SO _2$ and $NO _2$

  3. Photochemical smog

  4. Heat, sound and radioactive wastes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Heat in the form of thermal waste waters flowing out of electricity-generating units, e.g., thermal power plants, constitute important category of pollutants. Thermal waste water eliminates or reduces the number of organisms sensitive to high temperature, and may damage the indigenous flora and fauna. Noise is an unwanted sound, or sound which produces unpleasant effects and discomfort on the ears and reduces the quality of life. Radiation, that is given off by nuclear waste is extremely damaging to organisms, because it causes mutations at a very high rate. At high doses, nuclear radiation is lethal but at lower doses, it creates various disorders, the most frequent of all being cancer. All the three are pollutants but does not have any physical weight.  

So, the correct answer is option D.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which of the following is a secondary air pollutant?

  1. Ozone

  2. Carbon dioxide

  3. Carbon monoxide

  4. Sulphur dioxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Primary pollutants are emitted directly from sources, while secondary pollutants like ozone are formed in the atmosphere through chemical reactions between primary pollutants (like NOx and VOCs) and sunlight.