InterviewSolution
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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.
| 1951. |
Match column I with column II and select the correct option from the given codes. `{:("Column I", "Column II"),("Nitrates", (i)"Primary pollutant"),("E-Wastes", (ii) "Minamata disease"),("Mercury", (iii)"Secondary pollutant"),("DDT", (iv) "Blue-baby syndrome"),("PAN", (v)"Electronic wastes"):}`A. A-(ii), B-(iv), C-(v), D-(i), E-(iii)B. A-(iv), B-(v), C-(ii), D-(i), E-(iii)C. A-(iv), B-(v), C-(iii), D-(ii), E-(i)D. A-(ii), B-(v), C-(iv), D-(i), E-(iii) |
| Answer» Correct Answer - B | |
| 1952. |
Which of the following statements are correct ? (i) Benzene hexachloride (BHC) is a non-biodegradable pollutant. (ii) Anthropogenic air pollutants are natural in origin. (iii) Carbon monoxide is a primary air pollutant. (iv) Sulphur dioxide causes brown air effect during traffic congestion in cities.A. (i) and (iii)B. (i) and (ii)C. (ii) and (iii)D. (ii) and (iv) |
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Answer» Correct Answer - A Anthropogenic air pollutants are man made pollutants like emissions, burning of fossil fuels, mining, etc. Sulphur dioxide is produced in large quantity during smelting of metallic ores and burning of petroleum and coal in industries and by motor vehicles. It is the cause of acid rain. |
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| 1953. |
Peroxyacyl nitrates (PAN) are formed through photo-chemical reactions betweenA. sulphur oxides and hydrocarbonsB. nitrogen oxides and hydrocarbonsC. nitrogen oxides and `O_(3)`D. `CFCI_(3) " and " O_(3)` |
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Answer» Correct Answer - B Peroxyacyl nitrate (PAN) is produced due to reaction between `NO_(X)` and hydrocarbons under effect of UV-radiation of sunlight. |
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| 1954. |
World Environment Day is celebrated onA. 25th DecemberB. 20th SeptemberC. 5th JuneD. 9th July |
| Answer» Correct Answer - C | |
| 1955. |
Read the following statements regarding the PAN (Peroxyacyl nitrates) and select the correct ones. (i) It is a secondary pollutant present in photochemical smog. (ii) It is produced by photochemical reactions between hydrocarbons and nitrogen oxides in the presence of sulight or UV radiations. (iii) It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. (iv) It is a lacrymatory substance, causing irritation of eyes.A. (i) and (ii)B. (iii) and (iv)C. (i), (ii) and (iii)D. (i), (ii), (iii) and (iv) |
| Answer» Correct Answer - D | |
| 1956. |
PAN is formed by interaction of oxides of nitrogen and ….. In the presence of ….. |
| Answer» Correct Answer - Unburnt hydrocarbons, sunlight | |
| 1957. |
World Ozone Day is celebrated onA. 5th JuneB. 21 st AprilC. 16th SeptemberD. 22nd April |
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Answer» Correct Answer - C World Ozone Day is celebrated on 16th September. |
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| 1958. |
Secondary pollutant isA. `SO_(2)`B. `CO`C. DDTD. PAN |
| Answer» Correct Answer - D | |
| 1959. |
The major secondary pollutant formed from light striking the hydrocarbons are ………….A. PANB. `CO_(2)`C. sewageD. BHC |
| Answer» Correct Answer - A | |
| 1960. |
A : PAN is a secondary pollutant. R : PAN is formed by interaction of nitrogenoxides and hyrocarbon in the absence of light.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 - C | |
| 1961. |
Which of the following is a secondary pollutantA. PANB. AerosolC. COD. `CO_(2)` |
| Answer» Correct Answer - A | |
| 1962. |
Which of the following is a secondary pollutant ?A. `O_(3)`B. `SO_(2)`C. `CO_(2)`D. `CO` |
| Answer» Correct Answer - A | |
| 1963. |
Which of the following is a secondary pollutant ?A. COB. ` CO_2`C. ` SO_2`D. `O_3` |
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Answer» Correct Answer - D `O_3` is a secondary pollutant. |
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| 1964. |
In stratosphere , which of the following element acts as a catalyst in degradation of ozone an release of molecular oxygen ?A. CarbonB. CIC. FeD. Oxygen |
| Answer» Correct Answer - B | |
| 1965. |
In stratosphere , which of the following element acts as a catalyst in degradation of ozone an release of molecular oxygen ?A. CarbonB. ClC. FeD. Oxygen |
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Answer» Correct Answer - B In stratosphere, Cl elements acts as a catalyst in degradation of ozone and release of molecular oxygen. |
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| 1966. |
In stratosphere , which of the following element acts as a catalyst in degradation of ozone an release of molecular oxygen ?A. OxygenB. FeC. ClD. Carbon |
| Answer» Correct Answer - C | |
| 1967. |
In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order ?A. SE lt S lt PE lt DEB. SE lt PE lt S lt DEC. PE lt S lt SE lt DED. S lt DE lt PE lt SE |
| Answer» Correct Answer - D | |
| 1968. |
(A) : When resources become progressively limiting, the population growth pattern turns logistic. (R) : Population growth is ultimately limited by the carrying capacity of the environment.A. If both (A) and (R) are true but (R) is not the correct explanation of (A).B. If both (A) and (R) are true and (R) is the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false. |
| Answer» Correct Answer - B | |
| 1969. |
Accelerated eutrophication occurs due toA. increase in amount of dissolved oxygenB. disposal of waste rich in nitrates and phosphatesC. increase in concentration of DDT and mercury in waterD. unsafe disposal of radioactive wastes. |
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Answer» Correct Answer - B Cultural or accelerated eutrophication is nutrient enrichment of water bodies due to human activities like passage of sewage, industrial effluents and runoff from fertilised fields rich in nitrates and phosphates. Nutrients present in sewage, agriculture wastes and fertilisers cause dense growth of plants and planktonic algae. |
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| 1970. |
Assertion: The prime contaminants of the eutrophic water body are nitrates and phosphates which acts as plant nutrients. Reason: They overstimulate the growth of algae, fishes and other aquatic animals and robbing the water of dissolved oxygen.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. |
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Answer» Correct Answer - C The prime contaminants of the eutrophic water body are nitrates and phosphates which acts as plant nutrients They overstimulate the growth of algae causing unsightly scum and unpleasant odour, and robbing the water of dissolved oxygen causing death of fishes and other aquatic organisms. |
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| 1971. |
High concentration of nutrients especially nitrates and phosphates in water can accelerate which of the following phenomenon ?A. Algal bloomB. EutrophicationC. BiomagnificationD. Both (a) and (b) |
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Answer» Correct Answer - D Eutrophication is the excessive growth of algae, plants and animals in water bodies due to the nutrient enrichment particularly with nitrogen and phosphorus. This excessive growth of planktonic algae that causes colouration of water is called algal bloom. So, the high concentration of nitrates and phosphates in water increases both the eutrophication and algal bloom. |
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| 1972. |
Somatic hybridisation is achieved through ?A. GraftingB. Protoplast fusionC. ConjugationD. Recombinant DNA technology |
| Answer» Correct Answer - B | |
| 1973. |
Demographite transition is achieved when there isA. High birth rate and high but fluctuating death rateB. High birth rate and decline in death rateC. Decline in both but more in death rateD. Low death rate and low fluctuating birth rate |
| Answer» Correct Answer - D | |
| 1974. |
Mental disorder in which the patient is preoccupied with body functions and sensationsA. HypochondriaB. NeurastheniaC. Post - traumatic stressD. Attention - deficit disorder |
| Answer» Correct Answer - A | |
| 1975. |
Which of the following chemicals causes bone cancer and degeneration of tissues?A. Iodine-131B. Calcium-40C. Iodine-127D. Strontium-90 |
| Answer» Correct Answer - D | |
| 1976. |
Which of the following pollutant accumulates in the bones, replaces calcium and may cause bone cancer?A. Strontium - 90B. COC. `NO_(x)`D. SPM |
| Answer» Correct Answer - A | |
| 1977. |
Bone cancer is caused byA. Iodine 127B. Strontium 90C. Cesium 137D. None of these |
| Answer» Correct Answer - B | |
| 1978. |
The most hazardous metal pollutant of automobile exhaust isA. cadmiumB. mercuryC. copperD. lead |
| Answer» Correct Answer - D | |
| 1979. |
The most hazardous metal pollutant of automobile exhaust isA. MercuryB. CopperC. ArsenicD. Lead |
| Answer» Correct Answer - D | |
| 1980. |
Read the following statements regarding particulate matter and select the incoorect ones. (i) Particulate matter (PM) consists of shoot, flyash, dust, spores, pollen grains, etc. (ii) Particulate matter is differentiated into settleable (larger than `10 mu m`, remaining in air for less than one day) and suspended (less than `10 mu m` remaining in air for more than one day to several weeks ) particulate matter. (iii) SPM (Suspended particulate matter ) consists of aerosol, dust and mist. (iv) Particulate matter causes respiratory diseases such as tuberculosis, allergy and many more diseases in animals and plants. (v) According to Central Pollution Control Board (CPCB), particulate size of `2.5 mu m` or less in diameter are responsible for causing the greatest harm to human health.A. (i) and (ii)B. (iii) and (iv)C. (ii) onlyD. None of these |
| Answer» Correct Answer - D | |
| 1981. |
Which of the following chemicals causes bone cancer and degeneration of tissues?A. I-131B. Ca-40C. I-127D. Sr-90 |
| Answer» Correct Answer - D | |
| 1982. |
One of the most dangerous radioactive pollutant is:A. Phosporus-32B. Strontium-90C. Calcium-40D. Sulphur-32 |
| Answer» Correct Answer - B | |
| 1983. |
Which of the following is the most dangerous metal pollutant of automobile exhaust ?A. CadmiumB. CopperC. MercuryD. Lead |
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Answer» Correct Answer - D Automobiles burn petroleum inefficiently causing 80 % of air pollution and 75 % of noise pollution in urban areas. They release hydrocarbons (13.7 %), carbon monoxide (77.2 %), nitrogen oxides (7.7%), sulphur oxides, ammonia, aldehydes and lead (90% of total lead poisoning). Lead is present in petroleum in the form of `Pb(CH_(3))_(4) " and " Pb(C_(2)H_(5))_(4)` as antiknock agent. |
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| 1984. |
Contamination of radioactive materials are dangerous because it causesA. biological magnificationB. gene mutationC. photochemical smogD. ozone destruction |
| Answer» Correct Answer - B | |
| 1985. |
One of the most dangerous radioactive pollutant is:A. phosphorus-32B. strontium-90C. calcium-40D. sulphur-32 |
| Answer» Correct Answer - B | |
| 1986. |
Which of the following radioactive isotopes is used in the detection of thyroid cancer?A. I-131B. U-238C. C-14D. P-32 |
| Answer» Correct Answer - A | |
| 1987. |
Compressed Natural Gas (CNG) isA. propaneB. methaneC. ethaneD. butane |
| Answer» Compressed Natural Gas (CNG) is the best and cheap fuel . It has replaced petrol and diesel fuel as it is considered as clean fual. CNG consists of around `90%` methane , by compressing it to less than `1%` of volume it occupies at standard atmospheric pressure . Propane and butane together form LPG or liquified petroleum gas while ethane is used in chemical industry to produce ethene. | |
| 1988. |
Compressed Natural Gas (CNG) isA. propaneB. methaneC. ethaneD. butane. |
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Answer» Correct Answer - B Compressed Natural gas (CNG) is mostly methane. It is better alternative to petrol or diesel in terms of adeverse effects on environment. In 2002, public transport vehicles in Delhi switched to CNG by the order of government as it burns more efficientyly and cause lesser pollution. |
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| 1989. |
Compressed Natural Gas (CNG) isA. ethaneB. butaneC. methaneD. propane |
| Answer» Correct Answer - C | |
| 1990. |
Assertion : Compressed natural gas (CNG) is natural gas under pressure and mainly composed of methane. Reason : One of the advantages of using CNG as a fuel in automobiles is that it requires very less space for storage as compared to that of petrol or diesel. |
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Answer» Correct Answer - C Comptessed natural gas (CNG), is made by compressing natural gas (which is mainly compsed of methane, `CH_(4)`). It is a better fuedl tan petrol or diesel as its combustion produces fewer undesirable gases that petrol or diesel. The cost and placement of fuel storage tanks is the major barrier to wider adoption of CNG as a fuel. CNG vehicles require a great amount of space for fuel storage than conventional gasoline powered vehicles. Laying down pipelines to deliver CNG through distribution points/pumps is another difficulty faced in switching over to CNG as an automobile fuel. |
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| 1991. |
The exhaust from a thermal power plant if passed through an electrostatic precipitator removesA. Sulphur dioxideB. Carbon dioxideC. Particulate matter upto 10 micrometersD. Particulate matter which is swept away by water flowing in opposite direction |
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Answer» Correct Answer - C The exhaust from a thermal power plant if passed through an electrostatic precipitator removes particulate matter up to 10 micrometers. |
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| 1992. |
Assertion : Through the use of catalytic converters, unburnt hydrocarbons are changed into carbon monoxide which in turn is changed into nitrogen oxides and water. Reason : Motor vehicles equipped with catalytic converters should use leaded petrol to protect the catalyst from degradation. |
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Answer» Correct Answer - D A catalytic converter is a vehicle emission control device that converts toxic pollutants of the exhaust gas into less toxic pollutants by catalysing a redox reaction. Catalytic converters, having expensive metals namely platinum-palladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases. Rhodium is used as reduction catalyst, palladium is used as an oxidation catalyst, and platinum is used both for oxidation and reduction. As the exhause passes through the catalytic converter, unburnt hydrocarbons are converted into carbon dioxide and water, and carbon monoxide and nitirc oxide are changed to carbon dioxide and nitrogen gas, respectively. Motor vehicle equipped with catalytic should use unleaded pertol because lead in the pertol inactivates the catalyst. |
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| 1993. |
Assertion : An electrostatic precipitator (ESP) is a particulate collection device that removes dust and smoke particles from flowing air using the force of an induced electrostatic charge. Reason : An ESP is a highly efficient device as it removes 99 percent of particulate matter present in the exhaust from a thermal power plant. |
| Answer» Correct Answer - B | |
| 1994. |
A : EI Nino is a climatic change which causes deleterious environmental changes. R : Increased trophospheric ozone due to El Nino cause shift of climatic regions.A. If both Assertion and Reason are true and the reason is the correct explanation of the assertion, then mark (1).B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true but Reason is false, then mark (3).D. If both Assertion and Reason are false, then mark (4). |
| Answer» Correct Answer - C | |
| 1995. |
Consider the following statements and select correct set w.r.t. global warming (a) EI Nino effect (b) Cooling of stratosphere and earth surface (c) Shifting of climatic zones (d) Snow blindness (e) Inpairment of hearing (f) Excessive deposition of ice at poles (g) Rise in sea level (h) Increase in eutrophicationA. a, c, e, g & hB. a, c, d, e, f & gC. a, b, c, d, f & hD. a, c & g |
| Answer» Correct Answer - D | |
| 1996. |
Match the column `{:(,"Column I",,"Column II"),(a.,"Ozone thickness",(i),"UV-rays"),(b.,"CFC",(ii),"Refrigerator"),(c.,"EI Nino effect",(iii),"Temperature increase"),(d.,"Skin cancer",(iv),"Dobson unit"):}`A. a(i), b(ii), c(iii), d(iv)B. a(ii), b(iii), c(iv), d(i)C. a (iv), b(ii), c(iii), d(i)D. a(iii), b(iv), c(ii), d(i) |
| Answer» Correct Answer - C | |
| 1997. |
Corrosion of statues and monuments occurs due toA. Photochemical smogB. Carbon monoxidesC. Acid rainD. Methen |
| Answer» Correct Answer - C | |
| 1998. |
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:A. OzoneB. AmmoniaC. MethaneD. Nitrous oxide |
| Answer» Correct Answer - A | |
| 1999. |
_________ is adapted as substitute for open buning dumps. |
| Answer» Correct Answer - Sanitary landfills | |
| 2000. |
_________ is the only solution for the treatment of e-wastes. |
| Answer» Correct Answer - Evences (recycling) | |