Practice Test


1) Which of the following is a biodegradable pollutant?


2) Atmosphere of big/metropolitan cities is polluted most by


3) The point of temperature inversion between troposphere and ionosphere is called


4) Photochemical smog is formed in


5) Which of the following is a sink for CO?


6) Ozone hole refers to


7) Fish die in water bodies polluted by sewage due to


8) Addition of phosphate fertilizers into water leads to


9) By green chemistry we mean


10) Negative soil pollution is


11) Poisonous gas present in the exhaust fumes of car is


12) The green house effect is caused by


13) About 20 km above the earth there is an ozone layer, which one of the following statements about ozone and ozone layer is true?


14) Surface water contains


15) Ozone is formed in the upper atmosphere from oxygen by the action of


16) Incomplete combustion of petrol or diesel oil in automobile engines can be best detected by testing the fuel gases for the presence of


17) Which one of the following regions of atmosphere contains ozone?


18) Increased asthmatic attacks in certain seasons are related to


19) Cyclone collector is used for minimizing


20) Which of the following statement is false?


21) Eutrophication causes reduction in


22) Ozone hole is maximum over


23) The region which is greatly affected by air pollution is


24) Which of the statement is false?


25) Which of the following is not regarded as a pollutant?


26) The brown, hazy fumes of photochemical smog are due to


27) Which of the following statement is false?


28) BOD is connected with


29) Which of the following is not a part of green chemistry?


30) Carbon monoxide is harmful to human beings as it


31) Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?


32) In Antarctica, ozone depletion is due to the formation of following compound?


33) Ozone in stratosphere is depleted by


34) Pick up the correct statement.


35) Result of ozone hole is


36) Photochemical smog is caused by


37) Acid rains are produced by


38) DDT is


39) Increasing skin cancer and high mutation rate are due to


40) As it passes into food chain, the concentration of DDT


41) When rain is accompanied by a thunderstorm, the collected rain water will have a pH value


42) The smog is essentially caused by presence of


43) The major air pollutant is


44) Ozone layer of stratosphere requires protection from indiscriminate use of


45) Bhopal gas tragedy of 1984 was caused by


46) Which compound is mainly responsible for the depletion of ozone layer?


47) Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due to


48) Among the following compounds, which one is not responsible for the depletion of ozone layer?


49) Depletion of ozone layer is due to


50) Which of the following is a living component of atmosphere?


51) Chlorofluorocarbons (CFCs) are widely used in air conditioners, refrigerators etc because of being


52) Which of the following is not a herbicide?


53) Which of the following statements is false?


54) The instrument used for measuring soil salinity is


55) The ozone layer forms naturally by


56) Identify the incorrect statement from the following.


57) Depletion of ozone layer over Antarctica takes place


58) Which one is the most toxic?


59) Identify the wrong statements in the following.


60) Pick up the correct statement


61) Pneumoconiosis is caused by in halation of


62) The water pollutants mainly responsible for the eutrophication are


63) Pick out the correct statement?


64) Gas released during Bhopal tragedy was


65) Mesosphere and thermosphere are collectively known as


66) The brown haze of photochemical smog is largely attributable to


67) Which of the following is not an air pollutant?


68) Select the incorrect statement.


69) Methane gas producing field is


70) The greatest affinity for haemoglobin is shown by


71) Identify the wrong statement in the following


72) Which of the following region is the coldest?


73) Which of the following statements about control of particulate pollution is false?


74) Identify the correct decreasing order of the following with respect to altitude from atmosphere.
I. Troposhere
II. Mesopshere
III. Thermosphere


75) Which of the following is secondary pollutant?


76) The basic component of the smog is


77) In Antarctica ozone depletion is due to the formation of following compound


78) The term acid rain was coined by


79) In which part of the atmosphere, ozone layer is present?


80) Ozone layer is present in


81) Temperature of troposphere decreases with altitude. This is because of


82) The gas that is not considered as a ‘green house gas’ is


83) Which of the following statements is not false?


84) Among the following statements which one is incorrect?


85) The number of ozone molecules converted into oxygen by one molecule of chlorofluorocarbon compound is


86) Use of chlorofluoro carbons is not encouraged because


87) An important product in the ozone depletion by chloroflurocarbons is


88) Which of the following statements is not true?


89) The photochemical smog can be suppressed by


90) Ultraviolet light causes


91) Which of the following acts as a sink for chlorine free radicals?


92) Statement 1: Presently, the global atmosphere is warming up
Statement 2: The depletion of stratospheric ozone layer has resulted in increases in ultraviolet radiations reaching the earth


93) Statement 1: Water having pH<5.5 is not suitable for drinking purposes.
Statement 2: As the pH of water decreases, the solubility of metal ions increases.


94) Statement 1: Photochemical smog is produced by nitrogen oxides
Statement 2: Vehicular pollution is a major source of nitrogen oxides


95) Statement 1: Suspended particulate matter (SPM)is an important pollutant released by diesel vehicles.
Statement 2: Catalytic converters greatly reduce pollution caused by automobiles.


96) Statement 1: Presently the global atmosphere is warming up.
Statement 2: The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the earth.


97) Statement 1: Carbon monoxide combines with haemoglobin.
Statement 2: CO has more affinity for haemoglobin.


98) Statement 1: Acid rain has a pH less than 5
Statement 2: Oxides of nitrogen and sulphur combine with rain water to produce acidic nature