InterviewSolution
Saved Bookmarks
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.
| 251. |
Which of the following is false?A. Photochemical smog has high concentration of reducing agents and is, therefore, called as reducing smog.B. Non-viable particulates consists of smoke, dust mist , fumes etc.C. Classical smog occurs in cool humid climate and it is mixture of smoke, fog and sulphur dioxide.D. Ozone reacts with unburnt hydrocarbons in polluted air to produce peroxyacetylnitrate (PAN). |
| Answer» Correct Answer - A | |
| 252. |
Greenhouse gas other than `CO_(2)` isA. `H_(2)`B. `N_(2)O`C. `O_(2)`D. `SO_(2)` |
| Answer» Correct Answer - B | |
| 253. |
Increased asthmatic attacks in certain seasons are related toA. Inhalation of seasonal pollenB. Eatin of seasonal vegetablesC. Low temperatureD. Wet and dry environment |
|
Answer» Correct Answer - A Increased asthmatic attacks in certain persons are related to inhalation of seasonal pollen |
|
| 254. |
Which of the following statements is correct?A. Ozone hole is a hole formed in stratosphere from which orone oozes outB. Ozone hole is a hole formed in the troposphere from which ozone oozes out.C. Ozone hole is thinning of ozone layer of stratosphere at some places.D. Ozone hole means vanishing of ozone layer around the earth completely |
|
Answer» Correct Answer - C Depletion of ozone in the ozone layer so that thinning of ozone layer occurs or a hole is produced is called ozone hole |
|
| 255. |
Acid rain are due toA. Oxides of PhosphorousB. Oxides of nitrogenC. Oxides of sulphurD. Both 2 & 3 |
| Answer» Correct Answer - 4 | |
| 256. |
If `BOD` of a river is high it means that the river isA. Not pollutedB. Very much polluted with inorganic chemicalsC. Very much polluted by organic chemicals which are decomposed by microorganismsD. Polluted by pesticides |
| Answer» Correct Answer - 3 | |
| 257. |
Which of the following statement is false?A. Absorption of the terrestrailly radiated heat by the carbon dioxide is the main cause of global warming.B. The global warming will increases the rate of melting of polar ice caps increasing the sea level.C. The global warming of the earth surface is mainly due to reforestationD. `CO_(2), NO,CH_(4),O_(3),C Cl_(4)` and water vapour ae greenhouse gases. |
| Answer» Correct Answer - C | |
| 258. |
BOD is connected with theA. Organic matterB. MicrobesC. Microbes and organic matterD. Inorganic matter |
| Answer» Correct Answer - 3 | |
| 259. |
Which of the following is responsible for asthmatic attacks ?A. Inhalation of pollenB. Cold wealthC. Eating vegetables grown in polluted waterD. All the above |
| Answer» Correct Answer - A | |
| 260. |
`BOD` isA. The amount of oxygen required to convert the NO in to `NO_(2)` in a certain volume of a sample of water.B. the amount of `F^(-)` ions required to convert, one mole of hydroxypatite into fluorapatite.C. The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water.D. The amount of oxygen required to break down the non-biodegradable waste. |
| Answer» Correct Answer - C | |
| 261. |
Due to increases in `O_(3)` level there can beA. impair visionB. excessive accumulation fluid in lungsC. irritation in eyes, nose and throatD. all of these |
|
Answer» Correct Answer - D Due to increases in `O_(3)` level, can be impairing of vision , death due to excessive accumulation of fluid in lungs, irritation in eyes, nose and throat. |
|
| 262. |
Which of the following process does not increase the amount of `CO_(2)` in atmosphere?A. Decay of animalsB. BreatingC. PhotosynthesisD. Buring of petrol |
|
Answer» Correct Answer - C During photosynthesis `CO_(2)` is used by plants to make food for their growth. |
|
| 263. |
The source of `CO_(2)` in the atmosphere were (A) Combustion (B) Fermentation (C) Respiratory processes of animal lifeA. A & BB. B & CC. C & AD. A, B, C |
| Answer» Correct Answer - 4 | |
| 264. |
The secondary precursors of photochemical smog are :A. `SO_(2)` and `NO_(2)`B. `SO_(2)` and hydrocarbonsC. `NO_(2)` and hydrocarbonsD. `O_(3)`and PAN |
| Answer» Correct Answer - D | |
| 265. |
Which is a green house gas ?A. `CO_(2)`B. `CH_(4)`C. `CF_(2)CI_(2)`D. All of these |
| Answer» Correct Answer - D | |
| 266. |
Which of the following is not a greenhouse gas ?A. MethaneB. OzoneC. CarbondioxideD. Nitrogen |
| Answer» Correct Answer - D | |
| 267. |
Fishes die by sewage becauseA. Of its bad smellB. It replaces food material of fishesC. It increases oxygen competition among fishesD. `CO_2` is mixed in large amount in water |
| Answer» Correct Answer - C | |
| 268. |
Sewage water is purified byA. MicroorganismsB. LighC. fishesD. Aquatic plants |
|
Answer» Correct Answer - A Swwage water is purified by micro organisms |
|
| 269. |
Chief source of water and soil pollution isA. MiningB. Thermal power plantC. Agro industryD. All the above |
|
Answer» Correct Answer - D |
|
| 270. |
Water pollutionA. Increases oxygenationB. Decreases turbidityC. Increases turbidity and deoxygenationD. Increases photosynthesis |
| Answer» Correct Answer - C | |
| 271. |
Which of the following statements is not true ?A. Ammonia acts as sink fo `NO_(x)`B. Limestone acts as sink for `SO_(x)`C. The average residence time of NO is one monthD. `SO_(x)` can be removed from flue gases by passing through a solution of citrate ions |
|
Answer» Correct Answer - C The average residence time of NO is 4 days . |
|
| 272. |
Atmospheric content of `CO_(2)` isA. `0.0034%`B. `0.034%`C. `0.34%`D. `3.4%` |
|
Answer» Correct Answer - B Atmospheric content of `CO_(2)` is 0.034% by volume |
|
| 273. |
Which of the following is not a greenhouse gas ?A. COB. `O_(3)`C. `CH_(4)`D. `H_(2)O` vapour |
|
Answer» Correct Answer - A Carbon dioxide , methane , water vapour , nitrous oxide , CFCs and ozone are greenhouse gases. Carbon monoxide , CO is not a greenhouse gas. |
|
| 274. |
Burning of fossil fuels is the main source of which of the following pollutants?A. Nirtrogen oxideB. Nitric oxideC. Nirtrogen oxideD. Suphur dioxide |
|
Answer» Correct Answer - D Burning of fossil fuels is the main cause of suphur dioxide. |
|
| 275. |
Which of the following statements is correct ?A. Ozone hole is a hole formed in stratosphere from which ozone oozes out.B. Ozone hole is a hole formed in the troposphere from which ozone oozes out.C. Ozone hole is thinning of ozone layer of stratosphere at some places.D. Ozone hole means vanishing of ozone layer around the earht completely. |
|
Answer» Correct Answer - C is the correct statement |
|
| 276. |
Disinfection of water removesA. hardnessB. tasteC. colourD. Bacteria |
|
Answer» Correct Answer - D The process by which harmful bacteria are destroyed to make it safe for drinking is called disinfection. Disinfection can be done by using: `{:(-O_(3),,boili ng,,),(-CaO,,-I_(2),,Br_(2)),(-UVliqui d,,-KMnO_(4),,),(-Cl_(2)("bleaching"),,,,):}`. |
|
| 277. |
Entrophication is a source of water pollution. It occurs when water:A. is low in nutrientsB. is high in nutrientsC. has high temperatureD. has excess amount of organic matter |
|
Answer» Correct Answer - B When water is high in nutrients like phosphates enhances the growth of algae, which cover the water surface and reduces the oxygen concentration in water which kills animals life and subsequent loss of biodiversity is known as eutrophication. |
|
| 278. |
One of the following is the chief source of water and soil pollutionA. Agro industryB. MiningC. Thermal power stationsD. All of these |
| Answer» Correct Answer - D | |
| 279. |
Which of the following is least pollutant ?A. `NO_(x)`B. `SO_(x)`C. `CO_(2)`D. `C_(x)H_(y)` |
| Answer» Correct Answer - C | |
| 280. |
The atmospheric gas which cannot produce green house effect isA. `N_(2)`B. `H_(2)`C. `CO_(2)`D. `O_(3)` |
| Answer» Correct Answer - A | |
| 281. |
Co-existence of biotic and abiotic components of the enviroment along with climatic factors such as temperature, humidity , etc. is calledA. eutropphicationB. atmosphereC. ecosystemD. halomorphism |
|
Answer» Correct Answer - C Ecosystem is defined as the co-existence of biotic and abiotic components along with climatic factors. |
|
| 282. |
The amount of chlorine avialable in water after disinfection is calledA. Free chlorineB. Free availabe chlorineC. residual chlorineD. combined avialable chloirne |
|
Answer» Correct Answer - C The amount of chlorine available in water after the disinfection is called residual chlorine. It is about `0.2-0.3 mg L^(-1)`. |
|
| 283. |
Acid rains is specified when `pH` isA. between 6 and 7B. between 7 and 9C. below 5.6D. above 9 |
|
Answer» Correct Answer - C Acid rain is due to dissolved acidic oxide of sulphur, nitrogen and carbon. Oxides of sulphur ad nitrogen are strong acids, hence `pH` is below 7. A `pH` of below 5.6 is specific for acid rain. |
|
| 284. |
The figure shows increase in `CO_(2)` content (ppm) from 1985 to 2015 in Delhi. The peaks come in about June and the valleys in January each year. Increase in `CO_(2)` content from 1985 to 2015 is about. A. `10%`B. `15%`C. `20%`D. `30%` |
|
Answer» Correct Answer - A From figure , `CO_(2)` content in `1985=318ppm` `CO_(2)` content in `2015 = 351 ppm` Increase in 30 years=33ppm Percentage increase w.r.t. `1985 value = (33xx100)/(318) = 10.37%`. |
|
| 285. |
BOD of waste water is estimated by measuring the amount of |
|
Answer» Biological Oxygen Demand (BOD) is th measure of level of pollution caused by organic biodegradable material. These biodegradable materials are decomposed by microorganism (bacteria) consuming dissolved oxygen. Low value of BOD indicates that water contains less biodegradable material. |
|
| 286. |
Photochemical smog is related to the pollution of :A. AirB. WaterC. SoilD. Nostoc |
|
Answer» Correct Answer - A Photochemicla smog is related to pollution of air |
|
| 287. |
Fishes die in water bodies polluted by swage due to : |
|
Answer» Presence of excessive algae growth shows that water contains a lot of phosphate due to inflow of fertilizers, etc. from the surroundings. The decomposition of algae growth produces bad smell and unattractive appearance making it unfit for recreational use the swimming, boating etc. Further, decrease in dissolved oxygen may be harmful for aquatic species like fishes etc. |
|
| 288. |
Increasing of temperature due to scattering of energy is determine by ozone, `CO_2` and water vapour, is known asA. RadioactivityB. Ozone effectC. Solar reactionD. Green house effect |
|
Answer» Correct Answer - D Reflection of light and heat takes place from plant community and soil. The reflected heat absorb by `CO_2` and produces heating in atmosphere. It is known as green house effect |
|
| 289. |
If `BOD` of a river is high it means that the river isA. Not pollutedB. Very much polluted with inorganic chemicalsC. Very much polluted with organic chemicalsD. Polluted with pesticides |
| Answer» Correct Answer - C | |
| 290. |
If `BOD` of a river is high it means that the river isA. Not pollutedB. Very pollutedC. Gets least amount of lightD. Temperature of water is low |
| Answer» Correct Answer - B | |
| 291. |
Which is not a water pollutant?A. Automobile exaustB. Plant nutrietnsC. Oxygen demanding wastesD. Disease causing agent. |
| Answer» Correct Answer - A | |
| 292. |
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb,40 ppb,100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration ofA. LeadB. NitrateC. IronD. Fluoride |
| Answer» Correct Answer - 2 | |
| 293. |
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration ofA. LeadB. NitrateC. IronD. Fluoride |
|
Answer» Correct Answer - B Higher concentration is of nitrate (100 pm) |
|
| 294. |
Identify the incorrect statement from the following:A. Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer.B. Ozone absorbs infrared radiationC. Depletion of ozone layer is because of its chemical raction with chlorofluroakanesD. Ozone absorbs the intense ultraviolet radiation of the sun. |
|
Answer» Correct Answer - B Ozone does not absorb infra radiation at all. It absorbs `UV`radiation coming from sun in the upper atmosphere and acts as an unbrella thus protecting human being living on earth. |
|
| 295. |
Identify the wrong statement in the following:A. Ozone layer does not permit infrared radiation from the sun to reach the earthB. Acid rain is mostly because of oxides of nitrogen and sulphurC. Chlorofluorocarbons are responsible for ozone layer depletionD. Green house effect is responsible for global warming |
|
Answer» Correct Answer - A (a) is wrong because ozone layer does not permit ultraviolet radiation from the sun to reach the earth |
|
| 296. |
Soybean is used to replace traditional inks in printer cartridages highlighting which of the green chemistry principles?A. Use of renewable feedstocksB. Atom economyC. Reduce derivativesD. Prevent waste |
|
Answer» Correct Answer - A This prevents disposal of used cartidges if soybean is used to replace traditional ink in printer catridges. Thus, it is use of renewable feedstocks . |
|
| 297. |
Lead isA. Air pollutantB. Soil pollutantC. Radioactive pollutantD. Noise pollutant |
|
Answer» Correct Answer - B Lead is a soil pollutant |
|
| 298. |
Assertion (A) : The medium which is afffected by the pollutant is receptor Reason (R) : The medium which reacts with pollutants is sink.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true but R is not correct explanation of A.C. A is true and R is falseD. A is false and R is true. |
| Answer» Correct Answer - 2 | |
| 299. |
The medium present in the environment which consumes some amount of certain pollutant is called aA. sinkB. targetC. neutralityD. buffer action |
|
Answer» Correct Answer - A Sink is the medium in the environment which comsumes partly or completely a certain pollutant. |
|
| 300. |
The medium present in the environment which consumes some amount of certain pollutant is called aA. sinkB. targetC. receptorD. none to these |
|
Answer» Correct Answer - A Sink is the medium in the environment which comsumes partly or completely a certain pollutant. |
|