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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1701. |
What initiatives were taken for reducing vehicular air pollution in Delhi? Has air quality improved in Delhi? |
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Answer» Delhi has been categorized as the fourth most polluted city of the world in a list of 41 cities. Burning of fossil fuels has added to the pollution of air in Delhi. Various steps have been taken to improve the quality of air in Delhi. Introduction of CNG (Compressed Natural Gas): By the order of the supreme court of India, CNG-powered vehicles were introduced at the end of year 2006 to reduce the levels of pollution in Delhi. CNG is a clean fuel that produces very little unburnt particles. Phasing out of old vehicles Use of unleaded petrol Use of low-sulphur petrol and diesel Use of catalytic converters Application of stringent pollution-level norms for vehicles Implementation of Bharat stage I, which is equivalent to euro II norms in vehicles of major Indian cities. The introduction of CNG-powered vehicles has improved Delhi’s air quality, which has lead to a substantial fall in the level of `CO_(2)` and `SO_(2)`. However, the problem of suspended particulate matter (SPM) and respiratory suspended particulate matter (RSPM) still persists. |
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| 1702. |
Heavy metals are defined as elements with densityA. ` gt 5 g // mm^3`B. ` lt 5 g // mm^3`C. `gt 5g//cm^3`D. `lt 5g//cm^3` |
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Answer» Correct Answer - C Heavy metals are defined as elements with densitygt `5g//cm^3` |
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| 1703. |
In vehicles, catalytic converters are used toA. lncrease mileageB. Convert `CO_2` to carbonatesC. Increase efficiency of lead petrolD. Convert CO to `CO_2` |
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Answer» Correct Answer - D In vehicles, catalytic converter are used to convert CO to `CO_2`. |
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| 1704. |
Toxic substances and heavy metals are often present in the waste water from industries likeA. Petroleum and paper manufacturingB. Metal extraction and processingC. Chemical manufacturingD. All of the above |
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Answer» Correct Answer - D Toxic substances and heavy metals are often present in the waste water from industries like petroleum, paper manufacturing, metal extraction, processing and chemical manufacturing. |
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| 1705. |
Undesired high level of sound is calledA. MusicB. NoiseC. SongD. Blast |
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Answer» Correct Answer - B Undesired high level of sound is called noise. |
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| 1706. |
In kyoto protocol, all nations agreed to reduce emission of green house gases byA. 2008B. 2010C. 2012D. 2018 |
| Answer» Correct Answer - C | |
| 1707. |
Increase in atmospheric temperature due to `CO_(2)` is called :A. Pasteur effectB. Blackman effectC. Emerson effectD. Greenhouse effect |
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Answer» Correct Answer - D Increase in atmospheric temperature due to `CO_2` is green-house effect. |
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| 1708. |
The reason for greenhouse effect isA. Higher `CO_2` concentration causing global warmingB. Absorption of infra-red rays by gases and dust particlesC. Both A and BD. Rarefaction of `CO_2` |
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Answer» Correct Answer - C The reason for greenhouse effect is higher `CO_2` concentration causing global warming and absorption of in Ira-red rays by gases and dust particles. |
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| 1709. |
According to Kyoto protocol the major nations abide to reduce concentration of greenhouse gases by:A. 2008B. 2010C. 2012D. 2018 |
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Answer» Correct Answer - C In Kyoto protocol, the major nations agreed to reduce emission of green house gases by 2012. |
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| 1710. |
Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:A. Ozone layer effectB. Radioactive effectC. Greenhouse effectD. Solar effect |
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Answer» Correct Answer - C Checking of reradiating heat by atmospheric dust,`O_3, CO_2` and watervapours is greenhouse effect. |
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| 1711. |
Checking of radiating heat by atmospheric dust, water vapour, ozone, `CO_(2)` etc., is known as:A. Solar effectB. Radioactive effectC. Greenhouse effectD. Ozone layer effect |
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Answer» Correct Answer - C The thick `CO_(2)` layer in troposphere functions like the glass panels of a greenhouse. This allows the sunlight to filter through but prevents the heat from being re-radiated in to outer space. |
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| 1712. |
Catalytic converter is used in automobilesA. to remove leadB. for converting unburnt hydrocarbon into `CO_(2)` and `H_(2)O`C. to remove `H_(2)O`D. All of the abvoe |
| Answer» Correct Answer - B | |
| 1713. |
The material generally used for sound proffing of rooms like a recording studio and auditorium, etc. isA. cottomB. coirC. woodD. styro foam |
| Answer» Correct Answer - D | |
| 1714. |
The material generally used for sound proffing of rooms like a recording studio and auditorium, etc. isA. cottonB. coirC. woodD. styro foam |
| Answer» Correct Answer - D | |
| 1715. |
Assertion (A): Deforestation is one main factor contributing to global warming. Reason (R) : Besides `CO_(2)`, two other gases methane and CFCs are also included under greenhouse gases:A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false. |
| Answer» Correct Answer - B | |
| 1716. |
Acid rain is caused by increase in the atmospheric concentration of :A. `SO_(2) and NO_(2)`B. `SO_(2) and CO`C. `CO_(2) and CO`D. `O_(3)` and dust |
| Answer» Correct Answer - A | |
| 1717. |
Assertion (A): UV radiation causes photodissociation of ozone into `O_(2)` and O, thus causing damage to the stratospheric change. Reason (R): Ozone hole is resulting in global warming and climate change.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false. |
| Answer» Correct Answer - C | |
| 1718. |
Acid rain is caused bu increase in the atmospheric concentration of:A. `SO_(3)` and `CO`B. `SO_(2)` and `NO_(2)`C. `CO_(2)` and `CO`D. `O_(3)` and dust |
| Answer» Correct Answer - B | |
| 1719. |
A : High concentration of atmospheric `SO_(2)` and `NO_(x)` causes acid rain. R : It causes damage to foliage and growing points of plant.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).B. If both Assertion & Reason are ture but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true statement but Reason is false, then mark (3).D. If both Assertion and Reason are false statements, then mark (4). |
| Answer» Correct Answer - B | |
| 1720. |
A : Polyblend is a fine powder of recycled plastics. R : The blend of polyblend and bitumen, helped to increase road life by a factor of three.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).B. If both Assertion & Reason are ture but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true statement but Reason is false, then mark (3).D. If both Assertion and Reason are false statements, then mark (4). |
| Answer» Correct Answer - B | |
| 1721. |
Which one is being tried in india as biofuel substitute for fossil fuels?A. MusaB. AegilopsC. JatrophaD. Azadirichta |
| Answer» Correct Answer - C | |
| 1722. |
A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?A. A, CB. A, BC. B, CD. C, D |
| Answer» Correct Answer - B | |
| 1723. |
A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?A. (a), (c)B. (a), (b)C. (b), (c)D. (c), (d) |
| Answer» Correct Answer - A | |
| 1724. |
A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?A. a, bB. b, cC. c, dD. a, c |
| Answer» Correct Answer - D | |
| 1725. |
A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?A. a, bB. a, cC. b, cD. c, d |
| Answer» Correct Answer - B | |
| 1726. |
Which one of the following is not a bioindicator of water pollution ?A. Sludge wormsB. Blood wormsC. Stone filiesD. Sewage fungus |
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Answer» Correct Answer - C Among the following stone flies are not bioindicators of pollution. Stone flies (e.g. Perla sp.) belong to order-Plecoptera of class - Insecta, which has the terrestrial mandibulates. |
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| 1727. |
A lake near a village suffered heavy mortality of fishes within a few days. Which of the following statements could be the correct explanation for this ? (i) Lots of urea and phosphate fertillisers were used in the crops in the nearby fields. (ii) The croplands of the village were fertillised fields rich in nitrate and phosphate. (iii) The lake water turned green and stinky. (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.A. II, IIIB. III, IVC. I, IIID. I, II |
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Answer» Correct Answer - D A lake near a village suffered heavy mortality of fishes within a few days, because lots of urea and phosphate fertiliser were used in the crops in the vicinity and the area was sprayed with DDT by an aircraft. Inorganic phosphorus and nitrogen are responsible for the growth of algae. In polluted water, these increase due to which algae increase greatly at the surface of water forming water bloom. Due to the death of these algae their organic matter gets decomposed due to which oxygen gets depleted and aquatic animals die. |
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| 1728. |
According to Central Pollution Control board (CPCB). Which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?A. `1*0` or lessB. `5*2-2*5`C. `2*5` or lessD. `1*5` or less |
| Answer» Correct Answer - C | |
| 1729. |
According to Central Pollution Control board (CPCB). Which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?A. 1.0 or lessB. 5.2-2.5C. 2.5 or lessD. 1.5 or less |
| Answer» Correct Answer - C | |
| 1730. |
According to Central Pollution Control board (CPCB). Which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?A. 5.2 - 2.55B. 2.5 or lessC. 1.5 or lessD. 1.0 or less |
| Answer» Correct Answer - B | |
| 1731. |
According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health ?A. 2.5 or lessB. 1.5 or lessC. 1.0 or lessD. 5.2 or less |
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Answer» Correct Answer - A According to CPCB, air pollutants of size 2.5 or less (in micrometres) diameter are harmful to human health. It is the main cause of respiratory disorders in polluted cities like Delhi. |
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| 1732. |
According to the Central Pollution Control Board, particles that are responsible for causing great harm to human health are of diameterA. 2.50 micrometersB. 5.00 micrometersC. 10.00 micrometersD. 7.5 micrometers |
| Answer» Particulate air pollutant like soot, flyash, dust of various types, pollens, spores, fur hair,ect., can be differentiated as setteable `(10mu " m or more")` and suspended ,` ("less than" 10mu m)` Particulate matter pollutant. Their effect (on the environment) depends on the size of particles . According to CPCB, particulate matter of 2.5mu m or less in diameter are responsible for causing great garm to human health. The particular matter of 2.5 or less in size are inhaled deep into the respiratory tract (upto lungs) and causes respiratory problems and may even lead to death. | |
| 1733. |
According to the Central Pollution Control Board, particles that are responsible for causing great harm to human health are of diameterA. 2.50 micrometersB. 5.00 micrometersC. 10.00 micrometersD. 7.5 micrometers. |
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Answer» Correct Answer - A Particulate matter causing air pollution is differentiated into settleable (larger than `10 mu` m) and suspended (less than `10 mu` m) particulate matteer. According to Central Pollution Control Board, particles of `2.5 mu` and lesser diameter are most harmful to human health as they can pass deep into lungs causing breathing and respiratory problems. |
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| 1734. |
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:A. `lt` 100 ppmB. `lt` 30 ppmC. `lt` 3 ppmD. `lt` 10 ppm |
| Answer» Correct Answer - A | |
| 1735. |
According to Central Pollution Control board (CPCB). Which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health? |
| Answer» Correct Answer - A | |
| 1736. |
According to Central Pollution Control Board, air pollutants responsible for great harm have a size (in/mm) ofA. 1.0 or lessB. 1.5 or lessC. 2.5 or lessD. 5.2—2.5 |
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Answer» Correct Answer - C According to Central Pollution Control Board, air pollutants responsible for great harm have a size (in! mm) of 2.5 or less. |
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| 1737. |
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:A. lt 3.0 ppmB. lt 10 ppmC. lt 100 ppmD. lt 30 ppm |
| Answer» Correct Answer - D | |
| 1738. |
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:A. ` lt 30 ppm`B. ` lt 3*0` ppmC. ` lt 10` ppmD. `lt 100` ppm |
| Answer» Correct Answer - A | |
| 1739. |
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:A. lt3.0 ppmB. lt10 ppmC. lt 30 ppmD. lt 100 ppm |
| Answer» Correct Answer - C | |
| 1740. |
The Montreal Protocol refers to:A. substances that deplete ozone layerB. persistent organic pollutantsC. global warming and climate changeD. biosafety of genetically modified organisms |
| Answer» Correct Answer - A | |
| 1741. |
Limit of BOD prescrived by Central Pollution Control Board for the discharge of industrial and municipal waste into natural surface water, isA. `lt 3.0` ppmB. `lt 10` ppmC. `lt 100` ppmD. `lt 30` ppm |
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Answer» Correct Answer - B The Central Pollution Control Board prescribed the BOD limit for the discharge of industrial and municipal waste as `lt 10` ppm. |
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| 1742. |
The Montreal Protocol refers to:A. persistent organic pollutantsB. global warming and climate changeC. substances that deplete the ozone layerD. biosafety of genetically modified organisms |
| Answer» Correct Answer - C | |
| 1743. |
The Montreal Protocol refers to:A. persistent organic pollutantsB. global warming and climatic changeC. substances that deplete the ozone layerD. biosafety of genetically modified organisms |
| Answer» Correct Answer - C | |
| 1744. |
Photochemical smog pollution does not containA. ozoneB. nitrogen dioxideC. carbon dioxideD. PAN (Peroxy Acyl Nitrate) |
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Answer» Correct Answer - C Photochemical smong is highly oxidising pollutant comprising largely of ozone `(O_(3))`, oxides of nitrogen `(NO_(x))`, hydrogen peroxide `(H_(2)O_(2))`, organic peroxides, Peroxy Acetyl Nitrate (PAN) and Peroxy Benzyl Nitrate (PBN) but not carbon dioxide `(CO_(2))`. |
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| 1745. |
The Montreal Protocol refers to:A. presistent organic pollutantsB. global warming and climate changeC. substances that deplete the ozone LayerD. biosafety of genetically modified organisms |
| Answer» Correct Answer - C | |
| 1746. |
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:A. 1987B. 1988C. 1985D. 1986 |
| Answer» Correct Answer - A | |
| 1747. |
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:A. 1986B. 1987C. 1988D. 1985 |
| Answer» Correct Answer - B | |
| 1748. |
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:A. 1988B. 1985C. 1986D. 1987 |
| Answer» Correct Answer - D | |
| 1749. |
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:A. 1985B. 1986C. 1987D. 1988 |
| Answer» Correct Answer - C | |
| 1750. |
`O_(3)` in ozone layer is formed by action ofA. IR radiationsB. Blue radiationsC. UV radiationsD. Other radiations |
| Answer» Correct Answer - C | |