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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.
| 351. |
Black-foot disease is caused due to groundwater contaminated with excess ofA. MercuryB. SulphurC. ArsenicD. Fluoride |
| Answer» Correct Answer - C | |
| 352. |
The viable particulate among the following isA. FumesB. SmokeC. AlgaeD. Mist |
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Answer» Correct Answer - C Algae |
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| 353. |
Select the correct temrs .A. Biodegradable pollutants: Which are degraded by natrual processes rapidlyB. Non-biodegradable pollutants: Which are slowly degraded and remain in the enviroment in a unchanged form for many decades .C. both (a) and (b)D. none of the above |
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Answer» Correct Answer - C Biodergradable pollutants are those which are degraded rapidly by natural resources-discarded vegetable, sewage waste, cloth. Non-biodegradable pollutants are degraded very slow (even more than decades) and remain in its original form-plastic aritcles, polybags, `DDT` synthetic articles. |
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| 354. |
The non-viable particulate isA. bactriaB. mouldsC. dustD. fungi |
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Answer» Correct Answer - C Dust is the non-viable particulate. |
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| 355. |
Photochemical smog is formed inA. summer during day timeB. summer during morning timeC. winter during morning timeD. winter during day time |
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Answer» Correct Answer - A Photochemical smog is formed in summer during day time. |
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| 356. |
Synergism relates to the phenomenon due toA. Single pollutantB. atmospheric gasesC. water pollutantsD. Two or more pollutants having much more effect than the total of individual pollutants. |
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Answer» Correct Answer - D A phenomenon in which two one more pollutants have much more effect than the total of individual pollutants is termed as synergism. |
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| 357. |
It is preferred to bleach paper usingA. `H_(2)O_(2)+` catalystB. `NaOCl`C. `SO_(2)`D. `Cl_(2)` |
| Answer» Correct Answer - 1 | |
| 358. |
Pick up the correct statementA. CO which is a major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog.B. Classical smog has an oxidizing character while the photochemical smog is reducing in characterC. Photochemical smog occurs in day time whereas the classical smog occurs in the morning hoursD. During formation of smog the level of ozone in the atmosphere goes down. |
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Answer» Correct Answer - C Photochemical smog is formed during the day time (in summer) when there is bright sunlight so that photochemical reactions can take place Classical smog is formed in the morning hours (in winter) when the temperature is low |
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| 359. |
Environmental benefits of green chemistry includeA. fewer law material and natural resources usedB. cleaner production technologies and reduced emissionsC. smaller quantities of hazardous waste to be treated and disposed ofD. All of the above |
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Answer» Correct Answer - D If one follows green chemistru guidelines, then environmental benefits are: `-` there is cheak on use of raw materials and natural resources. `-` there is less emission of poisonous gases. `-` technology improves and is more cleaner `-` disposal of dangerous waste is avoided. |
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| 360. |
Which one of the following statement is not true?A. Clean water would have a BOD value of less than 5 ppmB. oxides of suphur nitrogen and carbon are the most widesperead ari [pollutantC. ph of drinking water should be between 5.5-9.5D. concentration of DO below 6 ppm is good for the growth of fish |
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Answer» Correct Answer - D More the concentration of D.O better it is for the growth of the fishes |
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| 361. |
Which of the following statement is false?A. Photochemical smog causes irritation in eyesB. Londons smog is oxidizing in natureC. London smog is a mixture of smoke and fogD. Photochemical smog results in the formation of `PAN` |
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Answer» Correct Answer - B London smog is reducing in nature. |
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| 362. |
Photochemical smog is caused by a light mediated reaction between :A. COB. `CO_(2)`C. `O_(3)`D. `NO_(2)` |
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Answer» Correct Answer - D Photochemical smog is caused by `NO_(2)` |
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| 363. |
Methane gas producing field isA. Wheat fieldB. Paddy fieldC. Cotton fieldD. Groundnut field |
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Answer» Correct Answer - B Methane gas is prdouced in paddy fields |
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| 364. |
Ulraviolet radiation from sun causes a reaction that produces:A. FluoridesB. Carbon monoxideC. Sulphur dioxideD. Ozone |
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Answer» Correct Answer - D Ultravioled radiation from the sun causes a reation that produces ozone |
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| 365. |
Which one of the following statements regarding photochemical smog is not correct?A. Photochemical smog is formed through photochemical reaction involving solar energy .B. Photochemical smog does not cause irritation in eyes and throatC. Carbon monodixe does not play any role in photochemical smog formation.D. Photochemical smog is an oxidising agent in charcater. |
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Answer» Correct Answer - B Photochemical smog causes irritation in eyes and throat. |
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| 366. |
Which of the following does not cause pollutionA. Hydroelectric schemesB. AutomobilesC. Nuclear energy projectD. Thermal power project |
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Answer» Correct Answer - A Automobiles and thermal power plants cause air pollution. Radioactive power plants are the source of radioactive pollution and thermal pollution |
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| 367. |
Gaseous carbon dioxide dissolves in water droplets to produceA. Sulphonic acidB. Carbonic acidC. Sulphuric acidD. Carboxylic acid |
| Answer» Correct Answer - B | |
| 368. |
Which does not cause pollution?A. Thermal power plantB. Hydro-electric plantC. Nuclear power plantD. Automobiles |
| Answer» Correct Answer - B | |
| 369. |
DDT isA. An antibioticB. A fertilizerC. A non-degradable pollutantD. Dichlorodifluoro titanium |
| Answer» Correct Answer - C | |
| 370. |
Which is not a chemical pollutant?A. NoiseB. PesticidesC. LiquidsD. Solid wastes |
| Answer» Correct Answer - A | |
| 371. |
Which is not an air pollutant?A. `H_(2)`B. `H_(2)S`C. `SO_(2)`D. `O_(3)` |
| Answer» Correct Answer - A | |
| 372. |
The acid rain containsA. `H_(2)SO_(4)`B. `HNO_(3)`C. `H_(2)SO_(3)`D. All of these |
| Answer» Correct Answer - D | |
| 373. |
Which is most harmful for the life on the globe?A. Soil errosionB. Increasing desertC. Nuclear fall outD. Deforestation. |
| Answer» Correct Answer - C | |
| 374. |
Which air pollutant is not released by scooters and cars?A. `SO_(2)`B. Fly ashC. HydrocarbonsD. CO |
| Answer» Correct Answer - B | |
| 375. |
Which of the following statement is true about photochemical smog?A. it is reducing in natureB. it is formed in winterC. It is a sulphurous smog.D. Components of the smog, `NO` and `O_(3)`. Irritate the nose and throat and their high concentration couses headache, chest pain, dryness of the throat, cough and difficulty in breathing. |
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Answer» Correct Answer - B::D Photochemical smog occurs in warm, dry and sunny climate. It has high concentration of `NO,NO_(2)` and `O_(3)`. Their low concentration causes irritation in nose and throat and their high concentration causes headached, chest pain, cough and difficulty in breating. |
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| 376. |
Oxides of sulphur `(SO_(2),SO_(3))` are due toA. buring of sulphur containing fossil oreB. roasting and smelting of sulphide oreC. oxdation by air `H_(2)O_(2)` and `O_(3)`D. All of the above |
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Answer» Correct Answer - D (a) `S(in fossil fuel)+O_(2) rarr SO_(2)` (b) `2CuFeS_(2)+5.5O_(2)underset("Roasting")overset("Smelting")(rarr) Cu_(2)O+2FeO+4SO_(2)` (c ) `SO_(2)+O_(3)rarr SO_(3)+O_(2)` `SO_(3)+O_(3) rarr SO_(3)+O_(2)`. |
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| 377. |
Metal generally present in polluted air isA. CadmiumB. LeadC. MercuryD. Zinc |
| Answer» Correct Answer - B | |
| 378. |
In measurement of `BOD_x`, is generally taken as |
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Answer» Correct Answer - 5 We generally measure `BOD_5` where 5 represents number of days for which the sample is kept, i.e. amount of `O_2` consumed in 5 days |
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| 379. |
the biggest particulate matter isA. `HNO_(3)` dropletsB. Fly ashC. `H_(2)SO_(4)` dropletsD. Soot |
| Answer» Correct Answer - Fly ash | |
| 380. |
Which one of the following statement is not correct?A. DDT and BHC are not good insecticides because they are highly soluble in waterB. DDT and BHC are not good insecticides because they are absorbed by the soil and contaminate root cropsC. Aldrin is not a good insecticide because it is not biodegradableD. All the above are incorrect |
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Answer» Correct Answer - A DDT and BHC are not much soluble in water. |
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| 381. |
The statement which is not correct about control of particulate pollution is :A. In electrostatic precipitator, the particulates are made to acquire positive charge which are then attreacted by the negative electrode and removed.B. Gravity setting chamber removes larger particles from the airC. Cyclone collector removes fine particles in the diameter range 5-20 microns.D. Wet scrubbers are used to wash away all types of particulates . |
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Answer» Correct Answer - A Particulates acquire negative charge and are attracted by the positive electrode. |
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| 382. |
Noble prize in green chemistry is not associated withA. Richard `R` schrockB. Yves ChauvinC. Robert `H` GrubbsD. R Williamson |
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Answer» Correct Answer - D R Williamson is not associated with Nobal prize in green chemistry, other are Nobal prize winners in this field. |
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| 383. |
Which one of the following statement is not true ?A. Oxides of sulphur, nitrogen and carbon are the most widespread air pollutantB. pH of drinking water should be between 5.5-9.5C. Concentration of DO below 6 ppm is good for the growth of fishD. Clean water would have a BOD value of less than 5 ppm |
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Answer» Correct Answer - C Fish dies in water bodies polluted by sewage or other pollutants due to decrease in dissolved oxygen (D.O.) value below 6 ppm. |
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| 384. |
Modes of controlling pollution in large cities includes:A. Cleanlinesss and less use of insecticidesB. Proper disposal of organic wastages , sewage and industrial effluentsC. Broader roads and shifting of factories out of the residential areasD. All the above |
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Answer» Correct Answer - D |
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| 385. |
`CH_(3)CHO` can be prepared by (I) `CH_(3)COCl+H_(2) overset(d//BaSO_(4))(rarr)CH_(3)CHO+HCl` (II)`CH_(2)=CH_(2)+O_(2) overset(Pd(II)//Cu(II))underset(I n water)(rarr) CH_(3)CHO` which of the above is in accordance with `NGT` rules?A. only IIB. Only IC. Both (a) and (b)D. None of these |
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Answer» Correct Answer - A Method I used `Pd//BaSO_(4)` . `BaSO_(4)` causes toxic problems in water. Hence, this synthesis is not in accordance with `NGT` rules. Method `II` is desirable. |
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| 386. |
Green chemistry aims toA. design chemical products and processes that maximize profitsB. utilize non-renewal energyC. design chemical products and processes that work most efficentlyD. design safer chemical products and processes that reduce or eleminate the use and genaration of hazardous substance |
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Answer» Correct Answer - D Aim of green chemistry is to design safer chemical products and processes that reduce or eliminate the use and generation of hazardous substances. |
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| 387. |
Have you ever observed any water pollution in your area? What measures would you suggest to control it? |
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Answer» Water pollution arises as a result of various human acitivities. This includes discharges from wastewater treatment plants, run-off from agriculture fields, strom-water drainage, etc. Pollutants from these sources enter the water bodies, thereby contaminating the water and rendering it impure. Industries and chemical factories discharge toxic, heavy metals such as fe, Mn, Al, etc., along with organic wastes into water. Domestic sewage and animal excreta are also responsible for pathogenic contamination of water. These pollutants make water unfit for drinking. Therefore, all industrial and chemical discharges should be made free from toxic metals before allowing them to enter a water body. The concentration of these pollutants should be checked regularly. Compost should be preferred over chemical fertilizers in gardens and agricultural fields to avoid harmful chemicals from entering ground water. |
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| 388. |
Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution? |
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Answer» Major sorces of soil polltion are industrial wastes and agricultural pollutants such as pesticides, fertilizers, etc. It is very important to maintain the quality and fertility of soil to ensure and sustain the growth of plants and food crops. Insecticides like DDT are not soluble in water. For this reason, they remain in soil for a long time, contaminating the root crops. Pesticides like Aldrin and Dieldrin are non-biodegradable and highly toxic in nature. They can enter the higher trophic levels through food chains, causing metabolic and physiological disorders. The same is true for industrial wastes that comprises of several toxic metals like Pb, As, Hg, Cd, etc. Hence , the best way to check soil pollution is to avoid direct addition of pollutants to the soil. Also, wastes should undergo proper treatment. They should be recycled and only then, allowed to be dumped. |
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| 389. |
The ozone layer is depleted byA. NOB. `SO_2`C. `C_x H_y`D. CFCs |
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Answer» Correct Answer - A::D Ozone layer is depleted by NO as well as CFCs. |
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| 390. |
Ozone in the stratosphere is depleted byA. `CF_2Cl_2`B. `C_7H_16`C. `C_6H_6Cl_6`D. `C_6F_6` |
| Answer» Correct Answer - A | |
| 391. |
Ozone in stratosphere is depleted by:A. `CF_(2)CI_(2)`B. `C_(7)F_(16)`C. `C_(6)H_(6)CI_(6)`D. `C_(6)F_(6)` |
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Answer» Correct Answer - A Ferus `(CF_(2)CI_(2)and CCI_(3)F)` are ozone depleting agents in the upper strata of the atmosphere (stratosphee). |
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| 392. |
In India, rules of Green Chemistry are governed byA. `IGT`B. `RGT`C. `NGT`D. `SGT` |
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Answer» Correct Answer - C `NGT` (National Green Tribunal ) is the legislative institute that frames and governs rules of green chemistry. |
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| 393. |
Green house effect is caused byA. Green plantsB. Infra red raysC. UV raysD. X rays |
| Answer» Correct Answer - B | |
| 394. |
Which of the following practies will not come under green chemistry?A. if possible making use of soap made of vegetable oils instead of using synthetic detergentsB. Using plastic cans for neatly strong substancesC. Using bicycle for traveling small distances instead of using petrol`//`diesel based vehiclesD. Using `H_(2)O_(2)` for bleaching purpose instead of using chlorine-based bleaching agents. |
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Answer» Correct Answer - B Use of plastics is a major source of pollution. Thus, using plastics cans for storage is not under green chemistry. |
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| 395. |
One of them contributes maximum to air pollutionA. IndiaB. USAC. RussiaD. Britain |
| Answer» Correct Answer - B | |
| 396. |
Biological decay and release from ocean are important natural processes for the formation ofA. `O_(2)`B. `CO_(2)`C. `CO`D. `SO_(2)` |
| Answer» Correct Answer - B | |
| 397. |
Major aerosol pollutant present the jet plane emission isA. Sulphur dioxideB. FluorocarbonC. Carbon tetrachlorideD. Carbon monoxide |
| Answer» Correct Answer - B | |
| 398. |
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity ?A. `N_2O`B. `NO_2`C. `N_2O_5`D. NO |
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Answer» Correct Answer - C `N_2O_5` is not a common pollutant introduced into the atmosphere both due to natural and human activity |
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| 399. |
The pollutant released by jet aerosplanes in the atmosphere as fluorocarbons are calledA. Photochemical oxidantsB. Photochemical reductantsC. AerosotsD. Physical pollutants |
| Answer» Correct Answer - C | |
| 400. |
Atmosphere pollutant isA. `CO_(2)`B. COC. `O_(2)`D. `N_(2)` |
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Answer» Correct Answer - B CO is an atmospheric pollutant |
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