450. Use of leaded gasoline in internal combustion engines causes:
A. more pollution
B. no pollution
C. less pollution
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D. smoke emission
451. Growing more trees help to:
A. reduces CO2 and increase O2 in environment
B. reduce O2 in the environment
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C. increase CO2 in the environment
D. reduce SO2 in the environment
452. The presence of which of the following gases in the air checks the ultraviolet light from sunlight?
A. SO2
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B. O3
C. NO2
D. CO2
453. Which of the following does not increase pollution?
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A. Plantation of trees
B. Increase in human population
C. Rapid urbanization
D. Rapid industrialization
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454. How much gas an average adult human inhale?
A. 13.6 kg
B. 10 kg
C. 5mVkg
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D. 6m3/kg
455. Any particles of dispersed matter, solid or liquid, that are larger than individual molecules, are:
A. SO2 C. CH
B. Particulates
C. CFCs
D. Methane
456. Black lung, urban emphysema etc. are mainly due to:
A. Methane
B. SO2
C. Particulates
D. All of these
457. The main cause of acid rain (acid precipitation) is:
B. NO2
D. All of these
458. Which is true regarding the contamination of human body with S02?
A. Death can occur in just 30 seconds at very low conc. as 3 ppm
B. Eyes can’t see with 20 seconds of contact
C. No effect can occur on skin
D. All of the above
459. Technically, when we can term the rain as acid rain:
A. when its pH is below 5.0
B. when it has (CH4 + CO2)
C. when its colour is yellow
D. All of the above
460. Which will be more sensitive to acidity?
A. Microbes
B. Algae
C. Game fishes
D. None of these
461. If we have problems in Environmental Law, then which discipline solves the problems in Environmental Sciences?
A. Global environmental problems
B. Medical Science
C. Deforestation
D. Any of the above
462. The ultimate source of energy in an ecosystem is:
A. Glucose
B. Sunlight
C. ATP
D. Protein
463. When the fertility of the soil is lost, it is:
A. soil erosion
B. soil conservation
C. soil silting
D. soil conversion
464. Which of the plants is a hydrophytes?
A. Hydrilla
B. Mango
C. Cuscuta
D. Opuntia
465. In an ecosystem, the population of:
A. primary producers are larger than primary consumers
B. secondary consumers are largest
C. primary consumers out number primary producers
D. All of the above
466. Which of the following is damaging the layers in the stratosphere?
A. O3
B. CFCs
C. CF2-CF2
D. CaOCL,
467. “By burning fossils fuels, we release CO2 and other heat absorbing gases that cause global warming and may bring about Sea level rise and catastrophic climatic changes.” The result will be:
A. Acid rain
B. Global warming
C. Meteorites falling
D. None of these
468. Environmental Studies are very important for:
A. getting clean drinking water
B. hygienic living conditions
C. clean & fresh air
D. All of the above
469. Which is/are of the following corroding the vital support system on which all life depends?
A. Over-exploitation of natural resources
B. Pollution
C. Both of the above
D. None of the above
470. Excess of nitrates in the field get mixed up with drinking water. It may result in:
A. killing of intestinal bacteria
B. upsetting enzyme production
C. converting nitrates into nitrites which harms haemoglobin leading to anaemia
D. producing more amino acids
471. Radioactive pollution causes:
A. cancer of any types
B. lethal mutation
C. speeded senescence
D. any of the above
472. Air pollution causes:
A. skin diseases
B. bronchitis
C. blood cancer
D. blood pressure
473. Water pollution can be stopped best by:
A. treating effluents to remove injurious chemicals
B. rearing more fishes
C. cultivating useful water plants
D. spraying with DDT
474. Organic waste products:
A. should be buried deep in the soil
B. can be used for production of energy
C. should be treated with chemicals to prevent breeding of organisms
D. should be dumped into the sea
475. Ozone layer is chiefly disturbed by:
A. large number of automobiles
B. large number of factories
C. supersonic jets
D. chimney exhausts
476. (Carbon monoxide is a very harmful pollutant because it:
A. inactivates nerves
B. combines with oxygen
C. forms a stable compound with hemoglobin
D. inhibits Krebs’ cycle
477. B. O. D. of a river was found to be very low, this means water:
A. was clean
B. was polluted
C. contains algae
D. contains other dissolved minerals
478. SO2 pollution can be controlled by all the methods except by:
A. removing sulphur after combustion
B. precombustion disulphurisation
C. electricity
D. photochemical oxidants
479. Nuclear power generates:
A. photochemical pollution
B. S02 pollution
C. air pollution
D. thermal pollution
480. Many organic substances or organisms help in clearing the water when found in:
A. high concentration
B. low concentration
C. moderate concentration
D. neutral concentration
481. When pollution load is more in the lakes there cannot take place self purification because:
A. There is no 02 to sustain microbial activity
B. No sunlight is present C Microbes die
D. Pollutants settle down automatically
482. The level of tolerance of DDT is 10 ppm in case of Daphnia, therefore Daphnia:
A. can live up to this concentration
B. will die if concentration is lower than this
C. can tolerate ten times more concentration of DDT than 102ppm
D. cannot tolerate DDT at all
483. Better method of pest control is:
A. the use of chemical pesticide
B. the use of radioactive substance
C. by using pesticide taking into account number and composition of pest population
D. use of stem
484. The pollutants emitted by jet aero planes in outer atmosphere as fluorocarbons are known as:
A. photochemical oxidants
B. aerosols
C. smog
D. None of these
485. Which of the following is a qualitative pollutant?
A. CO2
B. Insecticide
C. Plastic
D. Both (B) and (C)
486. Acid rain is caused by:
A. SO2
B. SO2 and NO2
D. o2
487. The most dangerous radioactive air pollutant is:
A. Strontium-90
B. P-32
C. S-35
D. Ca-40
488. Ozone layer in upper atmosphere is destroyed by:
A. HCl
B. Photochemical smog
D. Chlorofluoro carbons
489. Term ‘nuclear winter’ is associated with:
A. nuclear war
B. nuclear disarmament
C. nuclear weapon testing
D. aftermath of a nuclear holocaust
490. Which of the following is a largest source of formaldehyde vapour pollution in a room?
A. Utensil
B. Furniture
C. Cooking range
D. Book
491. Activated sludge is associated with management of waste and it is a kind of:
A. chemical treatment
B. mechanical means
C. biological treatment
D. nuclear means
492. Which of the following is the main factor of water pollution?
A. Smoke
B. Industrial waste
C Ammonia
D. Detergents
493. What was the cause of “Yusho” disease which occurred in 1968 from a leak in canning factory?
A. DBCP
B. PCB
C. Formaldehyde
D. Mercury
494. UV radiations from sunlight cause the reaction that produce:
A. CO2
B. SO2
C. Ozone
D. NO2
495. UV radiations to disinfect polluted water is not generally recommended because:
A. it has no residual germicidal effect
B. it is not effective against most microorganisms
C. colour and turgidity of water reduces its disinfection potential
D. Both (A) and (C)
496. Nuclear explosion causes mainly:
A. noise pollution
B. soil pollution
C. water pollution
D. air pollution
497. Name the chemicals which cause bone cancer and tissue degeneration:
A. Iodine-131
B. Strontium-90
C. Iodine-127
D. Calcium
498. The chemical which causes damage to WBC, bone marrow, lymph, spleen, nodes and lungs is:
A. Iodine-131
B. Calcium
C. Strontium-90
D. Iodine-127
499. DDT is a/an:
A. Antibiotic
B. Biodegradable pollutant
C Non-biodegradable pollutant
D. None of above
500. Decomposition of domestic wastes under natural processes is known as:
A. Industrial pollution
B. Thermal pollution
C. Biodegradable process
D. Non-biodegradable process