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.
| 301. |
The temperature in troposphere with altitudeA. IncreaseB. DecreaseC. Increases and then decreasesD. Decreases and then increases |
| Answer» Correct Answer - 2 | |
| 302. |
The zone which extends above troposphere up to 50 km above sea level and contains dinitrogen, dioxygen , ozone and little water vapour is calledA. exosphereB. mesosphereC. ionosphereD. stratosphere. |
| Answer» Correct Answer - D | |
| 303. |
Variation of temperature `(T)` in the troposphere region with height (km) isA. B. C. D. |
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Answer» Correct Answer - D The temperature of the atmosphere falls continuously for the first `10 km` from sea level. |
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| 304. |
The depletion of ozone layer is due to:A. Oxides of nitrogenB. oxides of carbonC. Oxides of suphurD. None of the above |
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Answer» Correct Answer - A Depletion of ozone layer is mainly due to oxides of nitrogen |
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| 305. |
70% component of acid rain isA. `HNO_3`B. `H_2SO_4`C. HClD. `CO_2` |
| Answer» Correct Answer - B | |
| 306. |
Algae growth in water is controlled byA. bleachingB. aerationC. filtrationD. chlorination |
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Answer» Correct Answer - D Algae is a type of bacteria. Its growth can be controlled by chlorine (in the form of bleaching powder). `CaOCl_(2)+H_(2)O rarr Co(OH)_(2)+Cl_(2)` `Cl_(2)+H_(2)O rarr HClO+HCl` `HClO` has disinfectant property. |
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| 307. |
Pollution can be controlled byA. Sewage treatmentB. Manufacturing electrically operated vehiclesC. By checking atomic blastsD. All of the above |
| Answer» Correct Answer - D | |
| 308. |
The pollution in city like Delhi may be controlled to great extentA. By proper sewage and proper exit of chemicals from factoriesB. By wide roads and factories away from the cityC. By cleaning city and scanty use of pesticidesD. All of the above |
| Answer» Correct Answer - D | |
| 309. |
HeLa cells used in cell biology areA. Cancerous cells grown in cancer research laboratoryB. Cervical cancer cell derivativesC. Both (a) and (b)D. None of these |
| Answer» Correct Answer - C | |
| 310. |
The stratospheric ozone depletion leads toA. Forest firesB. Increase in the incidence of skin cancersC. Global warmingD. All of the above |
| Answer» Correct Answer - D | |
| 311. |
The ultimate environmental hazard to mankind isA. Noise pollutionB. Water pollutionC. Air pollutionD. Nuclear pollution |
| Answer» Correct Answer - D | |
| 312. |
Photochemical smog is formed inA. Summer during morning timeB. Summer during day timeC. Winter during morning timeD. Winter during day time |
| Answer» Correct Answer - B | |
| 313. |
The layer of atmosphere which extends upto 10km from sea level is calledA. TroposphereB. StratosphereC. IonosphereD. Mesophere |
| Answer» Correct Answer - A | |
| 314. |
A 3 carbon containing compound A which is a constituent of photochemical smog, is made to react with HCN, product isA. `{:(CH_(2)-CH_(2)-CHO),("|"),(""CN):}`B. `{:(CH_(3)-CH-CHO),(" |"),(" "CN):}`C. D. |
| Answer» Correct Answer - A | |
| 315. |
Positive soil pollution isA. Reduction in soil productivity due to addition of pesticides fertilizers and industrial wastesB. Reduction in soil productivity due to erossion and over useC. Converting fertile land into barren land by dumping ash, garbageD. All of these |
| Answer» Correct Answer - A | |
| 316. |
Which one of the following is not an organochlorine?A. ParathionB. DDTC. BHCD. Aldrin |
| Answer» Correct Answer - A | |
| 317. |
The term "Biomagnification refers to theA. Growth of organism due to food consumptionB. Increase in population sizeC. Blowing up of environmental issues by manD. Increase in the concentration of non-degradable pollutants as they pass through food chain |
| Answer» Correct Answer - D | |
| 318. |
Odd pollutant amongst the following isA. `SO_2`B. COC. `CO_2`D. Acid rain |
| Answer» Correct Answer - D | |
| 319. |
Most hazardous metal pollutant of automobile exhausts is :A. MercuryB. CadmiumC. LeadD. Copper |
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Answer» Correct Answer - C Lead is the most hazardous metal pollutant of automobile exhausts |
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| 320. |
Roasting of sulphides given the gas `X` as a by producet. This is a colortess gas with choking smell of burnt and causes great dumage to respiratory is acidic, act as a resulting agent and in acid never been isolated .The gas `X` isA. `SO_(2)`B. `CO_(2)`C. `SO_(3)`D. `H_(2)S` |
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Answer» Correct Answer - A `SO_(2)` gas is obtained when any sulphide are is roasted. `2M_(2)S+3O_(2) rarr 3M_(2)O+2SO_(2)` This gas `(SO_2)` exhibits all the charcteristics as given in the question. |
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| 321. |
Environment consists of (A) Atmosphere (B) Hydrosphere (C) BiosphereA. A & BB. B & CC. C & AD. A, B, C |
| Answer» Correct Answer - 4 | |
| 322. |
Biosphere includesA. HydrosphereB. AlmosphereC. LithosphereD. All of these |
| Answer» Correct Answer - D | |
| 323. |
HCIO is a powerfulA. PesticideB. InsecticideC. GermicideD. Herbicide |
| Answer» Correct Answer - C | |
| 324. |
Eutrophication can be observed inA. Saline soilB. DesertC. LakeD. Agricultural fields |
| Answer» Correct Answer - C | |
| 325. |
Which of the following does not occur when the sewage is discharged into waterA. Increase in `O_2`B. Cyanophycean blooms occurC. Depletion of layersD. Eutrophication |
| Answer» Correct Answer - A | |
| 326. |
Which disinfectant cannot be used in drinking water?A. Potassium permanganateB. Bleaching powerC. ChlorineD. Phenol |
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Answer» Correct Answer - D Phenol is an antiseptic as well as a disinfectant. It is for external use only. Other disinfectants can be used internally. |
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| 327. |
Statement-1: CO is poisonous air pollutant. Statement-2: CO binds with hoemoglobin of blood and decreases the oxygen carrying capacity of blood.A. Statement-1: is True, Statement-2 is True, Statement-2 is a correct explanantion for Statement-1B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1C. Statement:1 is True, Statement -2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - A | |
| 328. |
Chlorofluro carbons are effective scavengers for ozone due toA. Photolytic reaction of `O_(2)` producing `Cl` radicalsB. Photolytic decomposition of `O_(2)` producing `O_(3)`C. Photolytic decomposition of `O_(3)` by `Cl` into `O_(2)`D. Photolytic production of oxides of nitrogen |
| Answer» Correct Answer - 3 | |
| 329. |
What will be the effect of addition of organic material on waterA. COD remain unaffectedB. BOD remain unaffectedC. Increases BODD. Reduces BOD |
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Answer» Correct Answer - C When more organic matter are added to water, the BOD of the water will increase as the oxygen demand for decomposing the added organic matter will increase |
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| 330. |
Assertion : The amount of BOD in the water is a measure of the amount of organic material in the water . Reason : Clear water has BOD less than 5 ppm whereas highly polluted water can have BOD value of 17 ppm or more .A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the c orrect explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - b The amount of oxygen required by bacteria to breakdown the organic matter present in a certain volume of a sample of water is Biological Oxygen Demand (BOD) . Hence , higher the value of BOD, higher is the amount of organic material in the water . |
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| 331. |
Minimata disease first occurred inA. JapanB. ChinaC. KoreaD. Russia |
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Answer» Correct Answer - A Minimata disease was caused by eating fish taken from mercury polluted Minimata bay. |
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| 332. |
Water pollution can be stopped best byA. Treating effluents to remove injurious chemicalsB. Rearing more fishesC. Cultivating useful water plantsD. Spraying with DDT |
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Answer» Correct Answer - A For control of water pollution, sewage oxidation ponds or filter beds or septic tanks or decomposition ponds have been developed . These oxidation ponds have luxuriant growth of algae and bacteria . Algae release `O_2` and anaerobic bacteria breakdown sewage using this `O_2` |
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| 333. |
The major source of CO pollution is :A. Forest fireB. DeforestationC. Automobile exhaustD. All the above |
| Answer» Correct Answer - C | |
| 334. |
Soil pollution is due toA. insecticidesB. PesticidesC. herbicidesD. All of these |
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Answer» Correct Answer - D (a) Insecticides DDT (but banned due to adverse effect) Aldrin, dieldrin. (b) Pesticides As nicotine (before World War II organic phosphate carbonates). (c )Herbicides `NaClO_(3)` (Sodium chlorate), `Na_(3)AsO_(3)` (Sodium arsenite) |
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| 335. |
select the incorrect statement.A. If `DO` of water is below 6 ppm, the growth of fish gets inhibitedB. `O_(2)` reaches water through atmosphere or photosynthesis carried out by many aquatic green plants during day lightC. If `BOD` is below 5 ppm, it indicates polluted waterD. Aerobic bacteria organic waste and decrease DO` |
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Answer» Correct Answer - C Amount of oxygen required by bacteria of breakdown the organic matter present in a certain volume of water sample is called `BOD` (Biochemical Oxygen Demand). Clean water has `BODlt5 ppm`. Highly polluted water has `BOD ge17ppm`. |
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| 336. |
Sewage water can be purified for recycling with the action ofA. Aquatic plantsB. PenicillinC. Micro-organismsD. Fishes |
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Answer» Correct Answer - C Because micro-organisms can decompose complex organic compounds into simple organic compound |
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| 337. |
Thermal pollution of water bodies is due toA. Discharge of heat (hot water) from power plantsB. Discharge of chemicals from industriesC. Discharge of waste from miningD. Discharges of agricultural run off |
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Answer» Correct Answer - A Due to nuclear and other conventional sources , temperature of water bodies and atmosphere increases, which has adverse effect on different organisms. |
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| 338. |
In the lower atmosphere, ozone is formed by the reaction betweenA. `O_(2)` and `CFCs`B. `NO_(2)` and `O_(2)`C. `O_(2)` and `NO`D. all of these |
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Answer» Correct Answer - B `NO_(2)+hv rarr NO+O` `O_(2)+O+M rarr O_(3)+M` where `M`, represents a third body (a molecule or a particle) needed to absorb the excess energy of the reaction, without which there would just be an exchange of oxygen atoms within the oxygen molecule. Reaction with `NO` keeps the concentration of `O_(3)` in balance called steady state (0.025ppm)`. |
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| 339. |
Major water pollutants areA. Domestic sewageB. Chemical fertilizersC. Erosion of soil by strong miningD. All |
| Answer» Correct Answer - 4 | |
| 340. |
Most abundant water pollutant is:A. detergentsB. pesticidesC. industrial wasteD. ammonia |
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Answer» Correct Answer - A Dergents are widely used by human population and these detergents are easily mixed with water through drains and domestic sewage. |
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| 341. |
Which of these are biodgradable pollutants ?A. (1) and (ii)B. (1) and (iii)C. (i),(ii)and (iv)D. (iii) only |
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Answer» Correct Answer - D Only sewage is biodegradable . |
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| 342. |
Acid rain is produced byA. excessive release of CO in airB. excessive release of `SO_(2) and H_(2)S` in air .C. excessive release of `NO_(2) and SO_(2)` in airD. excessive release of `NH_(3) and CO_(2)` in air . |
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Answer» Correct Answer - C Acid rain is produced by excess of `NO_(2) and SO_(2)` released from burning of fossil fuels . ` 2SO_(2) to O_(2) to 2SO_(3)` ` SO_(3) + H_(2)O to H_(2)SO_(4)` ` 4NO_(2)+O_(2) +2H_(2)O to 4 HNO_(3)` |
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| 343. |
Most abundant water pollutant is:A. DetergentsB. Pesticide IC. Industrial watesD. Ammonia |
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Answer» Correct Answer - C Most abundant water pollutant is industrial wastes |
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| 344. |
Acid rains are produced byA. Exces `NO_(2) and SO_(2)` from burning fossil fuelsB. Excess production of `NH_(3)` by industry and coal gasC. Excess release of carbon monoxide by incomplete combustionD. Excess formation of `CO_(2)` by combustion and animal respiration. |
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Answer» Correct Answer - A Acid rians are produced photochemical oxidants include nitrous oxide nitric oxide and nitric acid |
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| 345. |
Assertion: Photochemical smog is oxidising in nature. Reason: Photochemical smog contains `NO_(2)` and `O_(3)` which are formed during the sequence of reactions.A. Both A and R are correct and R is the correct explanation of A.B. Both A and R are correct but R is not the correct explanation of A.C. Both A and R are not correct.D. A is not correct but R is correct. |
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Answer» Correct Answer - A Reason is the correct explanation for assertion. |
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| 346. |
Study the given diagram and answer the following question. Which is the most appropriate statement about the figure ?A. The trophic levels decrease from molecular level to human beingsB. At each tropic level the pollutants get approximately 10 times concentrated.C. The level of pollutants is maximum at molecular level and minimum in human beingsD. Repeated use of toxins reduces its c oncentration at highest level |
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Answer» Correct Answer - B Most of the pesticides and other nonbiodegradable toxins are transferred from lower trophic level to higher trophic level through food chain . At every level the concentration of toxins increases ten times. |
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| 347. |
As DDT passes into food chain , its concentrationA. remains sameB. decreasesC. become zeroD. increases |
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Answer» Correct Answer - D With every trophic level in the food chain the concentration of DDT increases. |
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| 348. |
Assertion: Photochemical smog is oxidising in nature. Reason: Photochemical smog contains `NO_(2)` and `O_(3)` which are formed during the sequence of reactions.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true and the reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - A Because of the presence of oxidising substance like `NO_(2),O_(3)` etc. photochemical smog is oxidising in nature. |
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| 349. |
Ozone layer of upper atmosphere is being destroyed by:A. CholorifluorocarbonB. `SO_(2)`C. Photochemical oxidant`//O_(2)` and `CO_(2)`D. smog |
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Answer» Correct Answer - A Chloroflurocarbons (CFCs) comes in contact with atmospheric gases and evertually reach stratosphere where they cause depletion in ozone layer. `{:(CF_(2)Cl_(2)(g) overset(UV)toCoverset(●)(l)(g)+overset(●)(C)F_(2) Cl(g),),(overset(●)(C)l+O_(3)to Cloverset(●)(O) (g)+O_(2)(g),),(Cloverset(●)(O)(g) tooverset(●)(Cl) (g)+O_(2)(g)):}` |
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| 350. |
Ozone layer of upper atmosphere is being destroyed by:A. CholorofluorocarbonB. `SO_(2)`C. Photochemical oxidants `//O_(2) and CO_(2)`D. Smog |
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Answer» Correct Answer - A Ozone layer of up[per atmosphere is being dertroyed by chlororfluorocarbons |
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