Tag: the environment and us

Questions Related to the environment and us

PAN stands for

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Per acetyl nitrite

  2. Peroxyacetyl nitrite

  3. Peroxy aceto-nitrite

  4. Pyridine aceto-nitrite

Show answer
Correct Option: B
Explanation:

The full form of PAN is Peroxyacetyl nitrate. It is a major pollutant of smog which has adverse effects on eyes and lungs. Therefore the correct answer is B.

Carbon monooxide is a pollutant because

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. It reacts with $O _2$.

  2. It inhibits glycolysis.

  3. Makes nervous system inactive.

  4. Reacts with haemoglobin.

Show answer
Correct Option: D
Explanation:

CO reacts with haemoglobin much faster than oxygen. It can be fatal to life. If the amount of CO is high, it forms carboxy haemoglobin on combination with haemoglobin which causes suffocation even leads to death in fetal condition. Thus, the correct answer is option D.

The most polluted city of the world is

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Zabol 

  2. Calcutta

  3. Tokyo

  4. New York

Show answer
Correct Option: A
Explanation:

According to the WHO, the most polluted city in the world in 2016 is Zabol in Iran with particulate matter concentration of 2.5. This is more than 20 times higher than the WHO's guidelines. Thus the correct answer is option A.

The unfavourable alteration of environment due to human activities is termed as

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Ecological disturbance

  2. Catastrophe

  3. Ecological degradation

  4. Pollution

Show answer
Correct Option: D
Explanation:
Pollution is defined as the process of making land, water, air or other parts of the environment unfavorable for life by the introduction of a contaminant into a natural environment through human activities. Thus the correct answer is option D.

Particulate pollutants are

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Small solid particles and liquid droplets

  2. Liquid droplets in atmosphere

  3. Small solid particles released into the atmosphere

  4. All of the above

Show answer
Correct Option: A
Explanation:

Particulate pollutants are the mixture of small solid particles and liquid droplets. It consists solid particles like soot, flash, dust of various types, fir, hair, spore etc. It is classified as the suspended particulate matter which is the source of pollution and may adversely affect the environment. It can cause harmful effects on health on inhaling it.

So, the correct answer is option A.

Which of the following is the major cause of pollution?

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Plants

  2. Man

  3. Fungi

  4. Hydrocarbon gases

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Correct Option: B
Explanation:

Hydrocarbons are nonbiodegradable pollutants. They are a type of secondary pollutants. They are very dangerous for life. Hydrocarbons are produced naturally as well as due to incomplete combustion of the fuels. They are the major cause of respiratory disorders. Man used fuel for their own purpose with releases harmful gasses and causes pollution.

Pollution is

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Release of toxic or undesirable materials in environment

  2. Conservation of energy

  3. Removal of top soil

  4. All of the above

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Correct Option: A

The lowest region of atmosphere is known as

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Stratosphere

  2. Ozonosphere

  3. Troposphere

  4. Mesosphere

Show answer
Correct Option: C
Explanation:

The atmosphere comprises of layers based on temperature. Each layer has a specific composition of gases. These layers are the troposphere, the stratosphere, mesosphere and thermosphere. All these layers are placed to a different level from the earth. 

The troposphere is the lowest layer of the Earth's atmosphere. It starts at Earth's surface and goes up to a height of 7 to 20 km above sea level. Most types of clouds are found in this region, and almost all weather occurs within this layer. It holds nearly all of the water vapor in the Earth's atmosphere, regulates temperature and produces weather. Hence option C is correct.

Which of the major sources of air pollution contributes pollutants like chlorofluorohydrocarbons?

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Industrial effluents

  2. Aerosols

  3. Sewage pollutants

  4. All of the above

Show answer
Correct Option: B
Explanation:

The presence of CFCs in the atmosphere results in the depletion of the ozone layer. They are used as coolants in refrigerators, aerosol sprays, coolers, etc. The increase in the concentration of the chloro- fluoro-hydrocarbon molecules in the atmosphere results in air pollution. 

Thus, the correct answer is option B. 

Classical smog is

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Dark brown smog

  2. Yellow brown smog

  3. Los Angeles smog

  4. Smog with secondary pollutants

Show answer
Correct Option: A
Explanation:
Smog is the fog containing smoke. Smog is of two types depending upon the type of pollutants; classical smog and photochemical smog.
  • Classical smog is formed when there is high concentration of sulphur dioxide and particulate matter produced due to combustion of fuels. It occurs in cold and humid climate. It is also known as London smog or Sulphurous smog and causes dark brownish colour of atmosphere.
  • Photochemical smog is formed when sunlight acts on the oxides of nitrogen and hydrocarbons produced from factories or by automobiles. It occurs in warm and dry climate. It is also known as Los Angeles smog and causes light brownish colouration of atmosphere.
So, the correct answer is 'Dark brown smog'.