Tag: environment and conservation

Questions Related to environment and conservation

Floride pollution produces necrosis or chlorosis of

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

  1. Midrib

  2. Leaf margin and tip

  3. Stem

  4. Petiole but not lamina

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Correct Option: B

Which of the following are bio pollutants? 

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

  1. Spores and pollen grains

  2. Algae

  3. Protonzoans

  4. Dairy and poultry waste

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Correct Option: B
Explanation:
Excessive amounts of nitrates and phosphates from agricultural run-off cause a type of biopollution called eutrophication that stimulates an explosive growth of algae that depletes the water of oxygen. When the algae die are eaten by bacteria. Hence pond waters become hypoxic (oxygen poor) or anoxic (completely depleted of oxygen) due to algal blooms. Thus the correct answer is option B.

Pollution indicator plants

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

  1. Are resistant to pollution

  2. Can purify the atmosphere

  3. Are very sensitive to pollution

  4. Are very sensitive to pollutants

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Correct Option: C
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. 

Labours working in a cement factory suffer from

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

  1. Cytosilicosis

  2. Bone marrow cancer

  3. Cardiac disease

  4. Asbestosis

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Correct Option: A
Explanation:

The labours who are working in the cement factories suffer from respiratory disorders. Cement contains silica and the cement is present in the powdered form which readily gets into the atmosphere. The cement particles when inhaled results in cytosilicosis. This is a disease in which there is an accumulation of silica in the cells of the body. 

Thus, the correct answer is option A. 

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

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

  1. CO

  2. $SO _2$

  3. CFC

  4. $CH _4$

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Correct Option: B
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.

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

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  1. Particulate pollutant

  2. Gaseous pollutant

  3. Aerosol

  4. Dust particle

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Correct Option: C
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.

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

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

  1. Epiphytic lichens

  2. Ferns

  3. Liver worts

  4. Horn worts

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Correct Option: A

Which of the following is a weightless pollutant?

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

  1. Sewage and exhaust emission

  2. $SO _2$ and $NO _2$

  3. Photochemical smog

  4. Heat, sound and radioactive wastes

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Correct Option: D
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.

The visibility in cities has reduced in comparison to villages due to the presence of

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  1. Air, soil and water pollution

  2. Air and water both

  3. Air pollution

  4. Both soil and water

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Correct Option: C
Explanation:

Particulate matter is the small and fine solid particles present in the atmosphere. These suspended particles may be due to aerosols, dust particles, particles of carbon or other elements, etc. When the amount of these particles and the pollutants in the atmosphere are higher, there is a reduction in the intensity of the sunlight reaching this region. Due to the air pollution in the cities, there is less intensity of the light which is received compared to the villages. 

Thus, the correct answer is option C. 

Which of the following is a secondary air pollutant?

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  1. Ozone

  2. Carbon dioxide

  3. Carbon monoxide

  4. Sulphur dioxide

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Correct Option: A