Which one of the following gases is most significant as air pollutant? A. Carbondioxide B. Oxygen C. Nitrogen D. Sulphur-dioxide

Which one of the following gases is most significant as air pollutant? A. Carbondioxide B. Oxygen C. Nitrogen D. Sulphur-dioxide
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In a sludge tank, the gas mainly produced, is A. Oxygen B. Nitrogen C. Hydrogen D. Carbon dioxide

Description : In a sludge tank, the gas mainly produced, is A. Oxygen B. Nitrogen C. Hydrogen D. Carbon dioxide

Last Answer : ANS: D

The gas evolved in sewers is A. Carbondioxide B. Hydrogen sulphide C. Methane D. All of these

Description : The gas evolved in sewers is A. Carbondioxide B. Hydrogen sulphide C. Methane D. All of these

Last Answer : ANS: D

In very first stage of decomposition of the organic matter in sewage A. Nitrites are formed B. Nitrates are formed C. Carbondioxide is formed D. Ammonia is formed

Description : In very first stage of decomposition of the organic matter in sewage A. Nitrites are formed B. Nitrates are formed C. Carbondioxide is formed D. Ammonia is formed

Last Answer : ANS: D

A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of A. Carbondioxide gas B. Hydrogen sulphide gas C. Methane gas D. Petrol vapours

Description : A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of A. Carbondioxide gas B. Hydrogen sulphide gas C. Methane gas D. Petrol vapours

Last Answer : ANS: C

Lead acetate test in sewer manhole is done to test the presence of A. Methane gas B. Hydrogen sulphide C. Carbondioxide gas D. Diesel vapours

Description : Lead acetate test in sewer manhole is done to test the presence of A. Methane gas B. Hydrogen sulphide C. Carbondioxide gas D. Diesel vapours

Last Answer : ANS: B

The gas which may cause explosion in sewers, is A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide

Description : The gas which may cause explosion in sewers, is A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide

Last Answer : ANS: B

The most serious air pollutant causing health hazard is – (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide

Description : The most serious air pollutant causing health hazard is – (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide

Last Answer : (1) Sulphur dioxide Explanation: Sulphur dioxide (SO2) is considered as the most serious single air pollutant causing health hazard, obstructing breathing. It always leads to airways inflammation, ... , pulmonary oedema, heart failure and circulatory collapse. It is also responsible for acid rain.

Which is a secondary air pollutant? (A) Photochemical smog (B) Sulphur dioxide (C) Nitrogen dioxide (D) Dust particles

Description : Which is a secondary air pollutant? (A) Photochemical smog (B) Sulphur dioxide (C) Nitrogen dioxide (D) Dust particles

Last Answer : (A) Photochemical smog

Which of the following is a secondary air pollutant? (A) Photochemical smog (B) Sulphur dioxide (C) Nitrogen dioxide (D) Dust particles

Description : Which of the following is a secondary air pollutant? (A) Photochemical smog (B) Sulphur dioxide (C) Nitrogen dioxide (D) Dust particles

Last Answer : (A) Photochemical smog

Which of the following is not an air pollutant ? A. Smoke B. Carbon Dioxide C. Nitrogen Gas D. Sulphur Dioxide

Description : Which of the following is not an air pollutant ? A. Smoke B. Carbon Dioxide C. Nitrogen Gas D. Sulphur Dioxide

Last Answer : C. Nitrogen Gas

Chief air pollutant which is likely to deplete ozone layer is a) Sulphur dioxide b) Carbon dioxide c) Carbon monoxide d) Nitrogen oxides and Fluorocarbons.

Description : Chief air pollutant which is likely to deplete ozone layer is a) Sulphur dioxide b) Carbon dioxide c) Carbon monoxide d) Nitrogen oxides and Fluorocarbons.

Last Answer : d) Nitrogen oxides and Fluorocarbons

The most serious air pollutant causing health hazard is (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide

Description : The most serious air pollutant causing health hazard is (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide

Last Answer : Sulphur dioxide

Which of the following auto mobile gases is not considered to be an air pollutant? (1) Carbon dioxide (2) Carbon monoxide (3) Sulfur dioxide (4) Nitrogen dioxide

Description : Which of the following auto mobile gases is not considered to be an air pollutant? (1) Carbon dioxide (2) Carbon monoxide (3) Sulfur dioxide (4) Nitrogen dioxide

Last Answer : (1) Carbon dioxide Explanation: There are mainly six air pollutants: carbon monoxide lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide.

Pick up the incorrect statement from the following: A. The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion B. Sludge digestion is carried out in sludge tank C. The gases produced in sludge digestion process, contain 75% carbon dioxide D. The gases produced in sludge digestion process, contain 75% methane

Description : Pick up the incorrect statement from the following: A. The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion B. Sludge digestion is carried ... contain 75% carbon dioxide D. The gases produced in sludge digestion process, contain 75% methane

Last Answer : ANS: C

If lime water is kept in the air, it turns milky due to presence of – (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Description : If lime water is kept in the air, it turns milky due to presence of – (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Last Answer : (1) Carbondioxide Explanation: Lime water is calcium hydroxide (Ca(OH)2). When carbon dioxide is passed into it, it turns milky because of the formation of calcium carbonate: Ca(OH)2 + CO2 = CaCO3 +H2O

If lime water is kept in the air, it turns milky due to presence of : (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Description : If lime water is kept in the air, it turns milky due to presence of : (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Last Answer : Carbondioxide

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: A

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: B

If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: C

The most dangerous pollutant in vehicular emissions is A. CO B. SO2 C. CO2 D. O3

Description : The most dangerous pollutant in vehicular emissions is A. CO B. SO2 C. CO2 D. O3

Last Answer : ANS: A

Which of the following is usually not an air-pollutant? (1) Hydrocarbons (2) Sulphur dioxide (3) Carbon dioxide (4) Nitrous oxide

Description : Which of the following is usually not an air-pollutant? (1) Hydrocarbons (2) Sulphur dioxide (3) Carbon dioxide (4) Nitrous oxide

Last Answer : (4) Nitrous oxide Explanation: The six air pollutants are carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide. The combustion of gasoline and other ... as laughing gas, is used in surgery and dentistry for its an-aesthetic and analgesic effects.

Which of the following is not a secondary air pollutant? (A) Ozone (B) Photochemical smog (C) Sulphur dioxide (D) All (A), (B) & (C)

Description : Which of the following is not a secondary air pollutant? (A) Ozone (B) Photochemical smog (C) Sulphur dioxide (D) All (A), (B) & (C)

Last Answer : (C) Sulphur dioxide

Which of the following is usually not an air-pollutant? (1) Hydrocarbons (2) Sulphur dioxide (3) Carbon dioxide (4) Nitrous oxide

Description : Which of the following is usually not an air-pollutant? (1) Hydrocarbons (2) Sulphur dioxide (3) Carbon dioxide (4) Nitrous oxide

Last Answer :  Nitrous oxide

Of all the gases present in the air, which one of the following is the highest in percentage? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen

Description : Of all the gases present in the air, which one of the following is the highest in percentage? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen

Last Answer : Ans:(c)

The atmospheric gas that is mainly responsible for Green House effect – (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Description : The atmospheric gas that is mainly responsible for Green House effect – (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Last Answer : (4) Carbondioxide Explanation: A greenhouse was (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental ... the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

The atmospheric gas that is mainly responsible for Green House effect : (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Description : The atmospheric gas that is mainly responsible for Green House effect : (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Last Answer : Carbondioxide

Which of the following is not a gaseous air pollutant? (1) Oxides of nitrogen (2) Hydrocarbon (3) Smoke (4) Oxides of sulphur

Description : Which of the following is not a gaseous air pollutant? (1) Oxides of nitrogen (2) Hydrocarbon (3) Smoke (4) Oxides of sulphur

Last Answer : (2) Hydrocarbon Explanation: The gaseous air pollutants of primary concern in urban settings include sulfur dioxide, nitrogen dioxide, and carbon monoxide; these are emitted directly into the air ... is also a pollutant. Hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.

Which of the following is not a gaseous air pollutant? (1) Oxides of nitrogen (2) Hydrocarbon (3) Smoke (4) Oxides of sulphur

Description : Which of the following is not a gaseous air pollutant? (1) Oxides of nitrogen (2) Hydrocarbon (3) Smoke (4) Oxides of sulphur

Last Answer : Hydrocarbon

An example of major air pollutant is – (1) Oxygen (2) Carbon monoxide (3) Helium (4) Carbon dioxide

Description : An example of major air pollutant is – (1) Oxygen (2) Carbon monoxide (3) Helium (4) Carbon dioxide

Last Answer : (2) Carbon monoxide Explanation: Carbon monoxide (CO) is a colourless, odorless, non-irritating but very poisonous gas which is a product by incomplete combustion of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide.

An example of major air pollutant is (1) Oxygen (2) Carbon monoxide (3) Helium (4) Carbon dioxide

Description : An example of major air pollutant is (1) Oxygen (2) Carbon monoxide (3) Helium (4) Carbon dioxide

Last Answer : Carbon monoxide

Give reason: Sulphur dioxide or sewage is a biodegradable pollutant.

Description : Give reason: Sulphur dioxide or sewage is a biodegradable pollutant.

Last Answer : Sulphur dioxide gets diluted with rainwater and becomes harmless. Sewage is made harmless by biological activity. Hence it is a biodegradable pollutant.

Major aerosol pollutant in jet plane emission is (a) sulphur dioxide (b) carbon monoxide (c) methane (d) fluorocarbon.

Description : Major aerosol pollutant in jet plane emission is (a) sulphur dioxide (b) carbon monoxide (c) methane (d) fluorocarbon. 

Last Answer : (d) fluorocarbon.

Which one is not a pollutant normally? (a) Hydrocarbon (b) Carbon dioxide (c) Carbon monoxide (d) Sulphur dioxide

Description : Which one is not a pollutant normally? (a) Hydrocarbon (b) Carbon dioxide (c) Carbon monoxide (d) Sulphur dioxide

Last Answer : (b) Carbon dioxide

Major aerosol pollutant in jet plane emission is (a) sulphur dioxide (b) carbon monoxide (c) methane (d) fluorocarbon

Description : Major aerosol pollutant in jet plane emission is (a) sulphur dioxide (b) carbon monoxide (c) methane (d) fluorocarbon

Last Answer : (d) fluorocarbon.

Which one is not a pollutant normally? (a) Hydrocarbon (b) Carbon dioxide (c) Carbon monoxide (d) Sulphur dioxide

Description : Which one is not a pollutant normally? (a) Hydrocarbon (b) Carbon dioxide (c) Carbon monoxide (d) Sulphur dioxide

Last Answer : (b) Carbon dioxide

Pick out the wrong statement. (A) Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in exhaust emissions (B) Inhalation of pollutant carbon monoxide results in death by asphyxiation (C) Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles (D) Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in atmosphere

Description : Pick out the wrong statement. (A) Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in exhaust emissions (B) Inhalation of pollutant carbon monoxide results ... D) Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in atmosphere

Last Answer : (C) Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles

Pick out the correct statement. (A) Deforestation helps in controlling the green house effect (B) Global warming is detrimental for increase in food productivity and may cause flood and cyclone (C) Lightening discharges are natural source of production of SO2 & H2S pollutant (D) Sulphur dioxide causes death by asphyxiation

Description : Pick out the correct statement. (A) Deforestation helps in controlling the green house effect (B) Global warming is detrimental for increase in food productivity and may cause flood and cyclone ( ... natural source of production of SO2 & H2S pollutant (D) Sulphur dioxide causes death by asphyxiation

Last Answer : (B) Global warming is detrimental for increase in food productivity and may cause flood and cyclone

Minamata disease is due to pollutant a) Lead b) Mercury c) Hydrogen Sulphide d) Sulphur dioxide

Description : Minamata disease is due to pollutant a) Lead b) Mercury c) Hydrogen Sulphide d) Sulphur dioxide

Last Answer : b) Mercury

Which of the following pairs is a sedimentary type of biogeochemical cycle? (a) Phosphorus and nitrogen (b) Phosphorus and sulphur (c) Oxygen and nitrogen (d) Phosphorus and carbon dioxide

Description : Which of the following pairs is a sedimentary type of biogeochemical cycle? (a) Phosphorus and nitrogen (b) Phosphorus and sulphur (c) Oxygen and nitrogen (d) Phosphorus and carbon dioxide

Last Answer : (b) Phosphorus and sulphur

The _________ gas produced during burning of coal is responsible for causing acid rain . a) oxygen b)sulphur dioxide c)nitrogen d)water vapour

Description : The _________ gas produced during burning of coal is responsible for causing acid rain . a) oxygen b)sulphur dioxide c)nitrogen d)water vapour

Last Answer : b)sulphur dioxide

The most important element involved in the food preparation of plants is a. Nitrogen b. Oxygen c. Carbon dioxide d. Sulphur

Description : The most important element involved in the food preparation of plants is a. Nitrogen b. Oxygen c. Carbon dioxide d. Sulphur

Last Answer : c. Carbon dioxide

The temperature affects the A. Biological activity of bacteria in sewage B. Solubility of gases in sewage C. Viscosity of sewage D. All the above

Description : The temperature affects the A. Biological activity of bacteria in sewage B. Solubility of gases in sewage C. Viscosity of sewage D. All the above

Last Answer : ANS: D

Pick up the incorrect statement from the following: A. Septic tanks are horizontal continuous flow type of sedimentation tanks B. Septic tanks are generally provided a detention period of 12 to 36 hours C. Septic tanks are completely covered and high vent shafts are provided for the escape of foul gases D. None of these

Description : Pick up the incorrect statement from the following: A. Septic tanks are horizontal continuous flow type of sedimentation tanks B. Septic tanks are generally provided a detention period of 12 to 36 hours C ... covered and high vent shafts are provided for the escape of foul gases D. None of these

Last Answer : ANS: D

Traps A. Are water seals which prevent the entry of foul gases B. Are used to trap the rats entering sewers C. Dissolve the foul gases D. Create symphonic action to increase the quick disposal of sewerage

Description : Traps A. Are water seals which prevent the entry of foul gases B. Are used to trap the rats entering sewers C. Dissolve the foul gases D. Create symphonic action to increase the quick disposal of sewerage

Last Answer : ANS: A

Pick up the incorrect statement from the following for allowing workers to enter sewers A. The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes B. Proper tests for the presence of poisonous gases must be carried out C. The men entering the manhole should be advised to smoke in the sewer D. Warning signals should be erected

Description : Pick up the incorrect statement from the following for allowing workers to enter sewers A. The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 ... entering the manhole should be advised to smoke in the sewer D. Warning signals should be erected

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Look at the following gases: 1. Carbon dioxide 2. Helium 3. Nitrogen 4. Oxygen The two most abundant gases in the atmosphere are: (a) 1 and 3 (b) 2 and 4 (c) 3 and 4 (d) 1 and 4

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The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

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Which of the following gases is present under pressure in soft drinks? (1) Oxygen (2) Nitrogen (3) Carbon dioxide (4) Nitrous oxide

Description : Which of the following gases is present under pressure in soft drinks? (1) Oxygen (2) Nitrogen (3) Carbon dioxide (4) Nitrous oxide

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Which of the following gases do plants and trees give out during photosynthesis? A. Hydrogen B. Nitrogen C. Oxygen (Answer) D. Carbon dioxide

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While many different gases are found in the atmosphere, a number do NOT contribute significantly to solar heating of the atmosphere. Which TWO of the following gases do NOT absorb much heat? w) carbon dioxide x) nitrogen y) water vapor z) oxygen

Description : While many different gases are found in the atmosphere, a number do NOT contribute significantly to solar heating of the atmosphere. Which TWO of the following gases do NOT absorb much heat? w) carbon dioxide x) nitrogen y) water vapor z) oxygen

Last Answer : ANSWER: X and Z -- NITROGEN and OXYGEN