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.
| 1551. |
Annual number of deaths in Delhi believed to be due to air pollution isA. 1000B. 5000C. 1500,000D. 15000 |
| Answer» Correct Answer - D | |
| 1552. |
In air pollution, Delhi ranksA. First most pollutedB. second most pollutedC. Third most pollutedD. Fourth most polluted |
| Answer» Correct Answer - B | |
| 1553. |
Antiknocking agent of unleaded petrol isA. DibromethaneB. Methyl-ethyl etherC. PropaneD. Methyl tert. Butyl ether. |
| Answer» Correct Answer - D | |
| 1554. |
Catalytic converter used for controlling pollution is used inA. Thermal plantsB. chimneysC. Brick kilnsD. Motor vehicles |
| Answer» Correct Answer - D | |
| 1555. |
Catalytic converter used for controlling pollution is used inA. Increases mileageB. Convert `CO_(2)` to carbonateC. Increase efficiency of lead petrolD. Convert CO to `CO_(2)` |
| Answer» Correct Answer - D | |
| 1556. |
The following table summarises the differences between biodegradable and non-biodegradable pollutants. Pick out the wrong diggerences and select the correct answer. A. (i) and (iv)B. (ii) and (iv)C. (iii) and (iv)D. (ii), (iii) and (iv) |
|
Answer» Correct Answer - C Biodegradable pollutants become part of rapid turnover in biogechemical cycles. The examples of biodegradable pollutants are sewage, garbage, animal waste and livestock. Most non-biodegradable pollutants do not enter biogeochemical cycle e.g., DDT, BHC, plastics, polyethylene, cans, glass, etc. |
|
| 1557. |
Which one of the following statements regarding CO gas is correct ?A. It is produced by the complete combustion of fossil fuels.B. It combines with haemoglobin to form carbamino-haemoglobin.C. It impairs oxygen transport resulting in giddiness, headache, asphyxia and even death.D. All of these |
|
Answer» Correct Answer - C Carbon monoxide (CO) is produced due to incomplete combustion of fossil fuels, metallurgical operations, automobile emission, cigarette smoking. CO combines with haemoglobin, produces carboxyhaemoglobin which impairs oxygen transport resulting in headache, decreased vision, cardiovascular disease, asphyxia. |
|
| 1558. |
Given below are some differences between primary air pollutants and secondary air pollutants. Which one of the following is an incorrect difference ?A. `{:(" Primary air pollutants", "Secondary sir pollutants"), ("These persist in the form in which they are added to the environment.", "These are formed by interaction among the primary pollutants."):}`B. `{:(" Primary air pollutants", "Secondary sir pollutants"), ("These are more toxic than the secondary pollutants.", "These are less toxic than the primary pollutants"):}`C. `{:(" Primary air pollutants", "Secondary sir pollutants"), ("Examples include DDT,"CO_(2) , "Examples include Ozone, PAN"):}`D. None of these |
|
Answer» Correct Answer - B Secondary air pollutants are more toxic than primary air pollutants. |
|
| 1559. |
Which metal inactivates a catalytic converter ?A. GoldB. IronC. SilverD. Lead |
| Answer» Correct Answer - D | |
| 1560. |
Main air pollutant isA. `CO`B. `CO_(2)`C. `SO_(2)`D. All of these |
| Answer» Correct Answer - D | |
| 1561. |
Which of the following is an example of Bioemediation ?A. `N_(2)` fixation in bacteria.B. Pesticides killing of microbesC. Ground water formation by bacteria.D. Microorganism using pesticides for energy |
| Answer» Correct Answer - D | |
| 1562. |
Which of the following is normally not an atmospheric classified pollutant?A. COB. `CO_(2)`C. `NO_(2)`D. Sulphur |
| Answer» Correct Answer - B | |
| 1563. |
Which one is not a pollutant normally ?A. HydrocarbonsB. carbon dioxideC. carbon monoxidesD. sulphur dioxide |
| Answer» Correct Answer - B | |
| 1564. |
Chlorofluorocarbons are air polluting agents which are produced byA. diesel trucksB. jet planesC. rice fieldsD. cellphones. |
|
Answer» Correct Answer - B Chlorofluorocarbons are the chemicals whichare used as refrigerants, propellants and solid plastic foams. The chemicals are released as aerosol by jets flying at high altitudes. Along with nitrogen oxides, chlorofluorocarbons react with ozone of ozonosphere and deplete the same. |
|
| 1565. |
Smog is combination ofA. air and water vapourB. water and smokeC. smoke and fogD. fire and water |
| Answer» Correct Answer - C | |
| 1566. |
Study the following statements regarding acid rain and select the incorrect ones. (i) Acid rain refers to the rainfall and other forms of precipitation with a pH of less than 5. (ii) Oxides of sulphur and nitrogen are released from automobile exhausts, industries , power plants, etc. (iii) These oxides of sulphur and nitrogen, may react with water in the air and form sulphuric acid `(H_(2)SO_(4))` and nitric acid `(HNO_(3))``. (iv) Acid rain has harmful effects on animals and human beings but no characteristic impact on plants.A. (i) and (iii)B. (iii) and (iv)C. (iv) onlyD. (ii) only |
|
Answer» Correct Answer - C Acid rain damages plants by direct effect on foliage and growing point- chlorosis, necrosis, defoliation, dieback. It causes leaching of essential minerals of soil. |
|
| 1567. |
Which one is not a pollutant normally ?A. HydrocarbonsB. Carbon dioxideC. Carbon monoxideD. Sulphur dioxide |
|
Answer» Correct Answer - B `CO_(2)` is an essential component of the air and its concentration is 0.03% but when `CO_(2)` concentration goes above this limit, it acts as a pollutant. |
|
| 1568. |
Select the correct match of air pollution source with the type of pollutant and the effect it produces.A. Chemical factory `to NO_(2) to ` Ozone holeB. Automobile exhaust `to N_(2)O to` Asphyxia effectC. Heavy industry `to CO_(2) to ` Acid rainD. Incinerators `to NO_(x) " gases " to` Photochemical smog |
|
Answer» Correct Answer - D Nitrogen oxides are produced naturally through biological and non-biological activities. Human activity forms nitrogen oxides in combustion process of industries, automobiles, incinerators and nitrogen fertillisers. Nitrogen oxides give rise to photochemical smog. |
|
| 1569. |
Which is the gas that produces the most damaging acid rains ?A. `SO_(2)`B. `O_(3)`C. `CO_(2)`D. `H_(2)` |
| Answer» Correct Answer - A | |
| 1570. |
Acid rains are produced byA. excess `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 |
|
Answer» Correct Answer - A `SO_(2)` and `NO_(2)` are the gases responsible for acid rains. `SO_(2)` mainly comes from burning of coal, fossil, fuel, in the form of smoke from industries. |
|
| 1571. |
Acid rains are produced byA. excess `NO_(x) " and " SO_(2)` from burning fossil fuelsB. ecess production of `NH_(3)` by industries and power plantsC. ecess release of carbon monoxide by incomplete combustion of fossil fuelsD. excess release of `CO_(2)` by combustion and animal respiration. |
|
Answer» Correct Answer - A Acid rain is caused by large scale emission oif acidic gases into the atmosphere from thermal power plants, industries and automobiles. The common ones are sulphur dioxide, nitrogen oxides `(NO_(X))` volatile organic carbons (VOCs) and hydrogen chloride. `NO_(X)` are also produced in atmosphere into lightining. Sulphur dioxide and nitrogen oxides are changed in the atmosphere into sulphuric acid and nitric acid by combining with oxygen and water. |
|
| 1572. |
Which is not dangerous for life ?A. Nuclear blastB. DeforestationC. Ozone layerD. Biopollutants. |
| Answer» Correct Answer - C | |
| 1573. |
Spraying of DDT produces pollution ofA. Air onlyB. Air and soil onlyC. Air, soil, and waterD. Air and water only |
| Answer» Correct Answer - C | |
| 1574. |
Acid rains are produced byA. Excess `NO_(2)` and `SO_(2)` from burning fossils fuelsB. excess production of `NH_(3)` by industry and coal gasC. Excess releases of carbon monoxide by incomplete combustionD. Excess formation of `CO_(2)` by combustion and animal respiration . |
| Answer» Correct Answer - A | |
| 1575. |
Spraying of `DDT` produce pollution of the type:A. Air and waterB. Air and soilC. Crops and airD. Soil and water. |
| Answer» Correct Answer - D | |
| 1576. |
Spraying of `DDT` produce pollution of the type:A. AirB. Air and waterC. Air and soilD. Air, water and soil. |
| Answer» Correct Answer - D | |
| 1577. |
Activated sludge process is concerned with waste management. It is aA. chemical treatmentB. biological treatmentC. mechanical meansD. nuclear means |
| Answer» Correct Answer - B | |
| 1578. |
Blue-baby syndrome is due toA. Air pollutionB. Soil pollutionC. Thermal pollutionD. Radioactive pollution |
| Answer» Correct Answer - B | |
| 1579. |
Which is wrongA. Most forests have been lost in tropical areasB. Greenhouse effect is natural phenomenonC. Ozone in upper part of atmosphere is harmful to animalsD. Eutrophication is natural phenomenon in fresh water bodies. |
| Answer» Correct Answer - C | |
| 1580. |
(a) Why are people living in West Bengal prone to black foot disease? (b) What is blue-baby syndrome ? Explain. |
|
Answer» (a) In West Bengal, ground water is contaminated with arsenic. Chronic exposure to arsenic causes black foot disease in humans. (b) Presence of excess nitrates in drinking water are harmful for human health and may be fatal for infants. In infants, excess nitrates react with haemoglobin to form non-functional methamoglobin that impairs oxygen transport. This condition is termed as blue-baby syndrome or methaemoglobinemia. |
|
| 1581. |
Superburg claimed to clean up oil slicks in ocean isA. Eschrichia coliB. Bacillus thuringenesisC. Pastuerella pestisD. Pseudomonas putida |
| Answer» Correct Answer - D | |
| 1582. |
Cloudy nights are warmer than the nights with clean sky. Explain. |
| Answer» Clouds, dust particles and water vapours can produce green house effect. This is the reason why cloudy, dusty and humid nights are warmer than the clear, dust-free and dry nights. | |
| 1583. |
For clean environment , which one is not essentialA. ProducerB. PolluterC. ConsumerD. Decomposer |
| Answer» Correct Answer - B | |
| 1584. |
DDT residues are rapidly passed through food chain causing biomagnification because DDT isA. Water soluble .B. Moderately toxicC. LiposolubleD. Nontoxic to aquatic animals |
|
Answer» Correct Answer - C DDT residues are rapidly passed through food chain as DDT is liposoluble. |
|
| 1585. |
Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto:A. 2 ppmB. 25ppmC. 50 ppmD. 100 ppm |
| Answer» Correct Answer - B | |
| 1586. |
Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto:A. `0*5` ppmB. `5*0` ppmC. `15*0` ppmD. `25*0` ppm |
| Answer» Correct Answer - D | |
| 1587. |
Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto:A. 10 ppmB. 5 ppmC. 25 ppmD. 2 ppm |
|
Answer» Correct Answer - C Biomagnification of DDT in aquatic food chain from 0.003 ppb in water to fish eating birds would be 25 ppm. |
|
| 1588. |
Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto:A. 100 ppmB. 50 ppmC. 25 ppmD. 2 ppm |
| Answer» Correct Answer - C | |
| 1589. |
Tissue culture technique was first attempted byA. HaberlandtB. NonbecourtC. HanningD. Gautheret |
| Answer» Correct Answer - A | |
| 1590. |
Greenhouse effect refers toA. cooling of earthB. trapping of UV raysC. production of cerealsD. warming of earth |
| Answer» Correct Answer - D | |
| 1591. |
Which of the following is a secondary air pollutant?A. AerosolB. COC. PAND. `CO_(2)` |
|
Answer» Correct Answer - C PAN (Peroxy Acetyl Nitrate) is secondary pollutant. Pollutants formed by the chemical interaction of primary pollutants with atmospheric gas and moisture, often catalysed by sunlight are called secondary pollutants. |
|
| 1592. |
Greenhouse effect refers toA. production of cerealsB. cooling of earthC. trapping of UV raysD. warming of earth |
|
Answer» Correct Answer - D Greenhouse effects refer to warming of earth due to increase in `CO_(2)`, CFCs, `SO_(2)` and other substances that disturbe the balance between the amount of energy received and that reflected back into the space. |
|
| 1593. |
A root is adventitious when it isA. SwollenB. Growing in marshy placesC. Formed from plumuleD. Modified for storage |
| Answer» Correct Answer - C | |
| 1594. |
Maximum growth in human foetus occus at the age ofA. Fourth monthB. Two monthsC. Six monthsD. Eight months |
| Answer» Correct Answer - A | |
| 1595. |
Heterophylly of Limnophila isA. SoboleB. CulmC. ScapeD. Intercalary stem |
| Answer» Correct Answer - B | |
| 1596. |
Which is called soluble RNAA. tRNAB. mRNAC. rRNAD. snRNA |
| Answer» Correct Answer - A | |
| 1597. |
After ELISA positive test, AIDS is confirmed throughA. Western blot analysisB. Dot blot techniqueC. Southern blot techniqueD. Northern blot technique |
| Answer» Correct Answer - A | |
| 1598. |
Synaptic vesicles occure inA. EnvironmentalB. AdaptiveC. HabitualD. Both A and B |
| Answer» Correct Answer - D | |
| 1599. |
Number of of codons in a genetic triplet code isA. 4B. 16C. 32D. 64 |
| Answer» Correct Answer - D | |
| 1600. |
The most famous pesticide of world isA. BHCB. DDTC. BaygonD. Flit |
| Answer» Correct Answer - B | |