Description : Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)
Last Answer : (D) CFC (chloro fluoro carbon)
Description : Depletion of ozone layer in the atmosphere causes cancer of a) skin b)stomach c)blood d)lungs
Last Answer : a) skin
Description : Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion ... rate? (A) CO (B) SO2 (C) NOx (D) CFC (chloro fluoro carbons)
Last Answer : (A) CO
Description : Excessive/chronic use of which of the following drugs is the root cause of lung cancer, cough bronchitis, emphysema, hypertension and cardiovascular symptoms? (a) Caffeine (b) Nicotine: cigarettes and chewing tobacco (c) Cocaine (d) Methadrine
Last Answer : Ans:(b)
Description : TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes (A) Skin disorder (B) Bronchitis (C) Bone disease (D) Cancer
Last Answer : (B) Bronchitis
Description : Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of stratospheric ozone layer has resulted in increase in ult
Last Answer : Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of ... true but reason is wrong D. Both are wrong
Description : Mirage is due to (a) Unequal heating of different parts of the atmosphere (b) Magnetic disturbances in the atmosphere (c) Depletion of ozone layer in the atmosphere (d) Equal heating of different parts of the atmosphere
Last Answer : Ans:(a)
Description : Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere? (1) Chlorofluorocarbons (2) Nitrous oxide (3) Sulphur dioxide (4) Carbon dioxide
Last Answer : (1) Chlorofluorocarbons Explanation: Chlorofluorocarbon contributes to ozone depletion in the upper atmosphere. It is an organic compound that contains only carbon, chlorine, and fluorine, produced as a ... methane, ethane, propane. Its manufacture has been phased out under the Montreal Protocol.
Description : CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone. (A) 10 2 (B) 10 5 (C) 10 9 (D) 10 15
Last Answer : (B) 10 5
Description : Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ? (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbon (4) Sulphur dioxide
Last Answer : Chlorofluorocarbon
Description : Melanoma (skin cancer) is associated with -------? A. ozone accumulation B. ozone depletion (Answer) C. acid rain D. allergens
Last Answer : B. ozone depletion (Answer)
Description : This cause the depletion of ozone layer by decomposing ozone to oxygen . a) CFC b)UV radiations c)CO2 d)O2
Last Answer : b)UV radiations
Description : Ozone layer in the outer atmosphere helps us in – (1) reflecting radio waves and makes radio communication possible (2) regulating he temperature of atmosphere (3) absorbing cosmic ray particles (4) absorbing U-V radiations
Last Answer : (4) absorbing U-V radiations Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03) which absorbs 97- 99% of the Sun's medium-frequency ultraviolet light.
Description : Ozone layer in the outer atmosphere helps us in (1) reflecting radio waves and makes radio communication possible (2) regulating the temperature of atmosphere (3) absorbing cosmic ray particles (4) absorbing U-V radiations
Last Answer : absorbing U-V radiations
Description : If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is A. 50 mg/l B. 100 mg/l C. 150 mg/l D. 250 mg/l
Last Answer : ANS: D
Description : If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is A. 50 ppm B. 100 ppm C. 150 ppm D. 200 ppm
Description : If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is A. 200 ppm B. 225 ppm C. 250 ppm D. None of these
Last Answer : ANS: C
Description : If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l
Description : Large diameter sewers subjected to external pressure alone, are reinforced A. Near the inner surface of the pipe B. Near the outer surface of the pipe C. Both A. and B. D. With elliptical cage
Description : Ozone depletion in the atmosphere is mainly caused by - (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon
Last Answer : (4) chlorofluorocarbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ethane. They contribute to ozone depletion in the upper atmosphere.
Description : Ozone depletion in the atmosphere is mainly caused by (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon
Last Answer : chlorofluorocarbon
Description : Effect of ozone layer depletion?
Last Answer : It causes harmful activities like skin cancer, cataracts. Mainlychildren are worst affected. It is also harmful for eyes.
Description : The depletion of ozone layer is due to:
Last Answer : The depletion of ozone layer is due to: A. Oxides of nitrogen B. Oxides of carbon C. Oxides of sulphur D. None of the above
Description : The depletion of Ozone layer is mainly due to – (1) Volcanic eruptions (2) Aviation fuels (3) Radioactive rays (4) Chlorofluorocarbons
Last Answer : (4) Chlorofluorocarbons Explanation: Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. Chloroiluorocarbon (CFC) is ... , chlorine, and fluorine, produced as a volatile derivative of methane and ethane.
Description : The depletion in Ozone layer is caused by - (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbons (4) Methane
Last Answer : (3) Chlorofluorocarbons Explanation: Chlorofluorocarbons (CFCs), also known as Freon, cause the breakdown of the ozone layer that protects the earth from the sun's ultraviolet (UV) radiation. In the ... depletion in the upper atmosphere, CFCs have been phased out under the Montreal Protocol of 1987.
Description : The depletion of ozone layer is due to - (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane
Last Answer : (1) chloro fluoro carbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ... R-4104 by the Montreal Protocol because they contribute to ozone depletion in the upper atmosphere.
Description : The depletion of ozone layer is caused by?
Last Answer : Chlorofluorocarbon (CFC)
Description : Dangerous gas for depletion of ozone layer is: (A)Ethane (B) Methane (C)CFC (D) Carbon-dioxide
Last Answer : (C)CFC
Description : Which of the following compounds has been suggested as causing depletion of the ozone layer in the upper stratosphere? (a) CH4 (b) CCl2F2 (c) CF4 (d) CH2Cl2
Last Answer : CCl2F2
Description : Depletion of ozone Layer is mainly due to
Last Answer : Chlorofluoro carbon
Description : Which one of the following is not a matter a global concern in the removal of tropical forests ? (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer ... , moisture content and reflectivity. (D) Their contribution to the biological diversity of the planet.
Last Answer : (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer.
Description : The depletion in Ozone layer is caused by ___________ . (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbons (4) Methane
Last Answer : Chlorofluorocarbons
Description : The depletion of Ozone layer is mainly due to (1) Volcanic eruptions (2) Aviation fuels (3) Radioactive rays (4) Chlorofluorocarbons
Description : The depletion of ozone layer is due to (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane
Last Answer : chloro fluoro carbon
Description : Pathogens (or pathogenic bacterias) in water may cause A. Typhoid B. Cholera C. Dysentery D. All the above
Description : Pick up the correct statement from the following: A. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated ... river C. Solubility of oxygen in sewage is 95% of that of distilled water D. All the above
Description : The gas which may cause explosion in sewers, is A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide
Last Answer : ANS: B
Description : Exposure to chemicals having carcinogenic properties cause (A) Dermatitis (skin disorder) (B) Cancer (C) Asphyxiation (suffocation) (D) Asthma
Last Answer : (B) Cancer
Description : Exposure to chemicals having carcinogenic properties cause (A) Dermatitis (skin disorder) (B) Cancer (C) Asphyxiation (D) Asthma
Description : Ozone in outer atmosphere Helps us–
Last Answer : In absorbing the Ultra violet radiations.
Description : Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:
Last Answer : Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers: A. Methane B. Nitrous oxide C. Ozone D. ammonia.
Last Answer : Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers: A. Nitrous oxide B. Ozone C. Ammonia D. Methane
Description : Increasing high skin cancer and high mutation rate are a) O3 depletion b) Acid rain c) CO pollution d) CO2 Pollution.
Last Answer : a) O3 depletion
Description : both skin and lung cancer are classified as carcinomas -General Knowledge
Last Answer : The given statement is true Carcinomas are cancers that begin in tissues lining the inner or outer surfaces of the body where the DNA of the cells become damaged. Lung cancer and one type of skin cancer are carcinomas.
Description : The radioactive Strontium-90 causes (1) Brain cancer (2) Skin cancer (3) Lung cancer (4) Bone cancer
Last Answer : (2) Skin cancer Explanation: Strontium-90 is a radioactive isotope of strontium produced by nuclear fission. Used mostly in weapons and nuclear power plants, poisoning usually occurs through accidental ... to various forms of skin cancer in cases where the radiation was absorbed through the skin.
Description : Some papillomaviruses are capable of causing a. A ―lacy‖ rash on the skin. b. Lung cancer. c. Pneumonia. d. Cervical cancer.
Last Answer : d. Cervical cancer.
Description : The radioactive Strontium-90 causes : (1) Brain cancer (2) Skin cancer (3) Lung cancer (4) Bone cancer
Last Answer : Skin cancer
Description : Oxide of sulphur present in the atmosphere are washed down by rains to cause – (1) Depletion of fossil fuel reserves (2) Eutrophication in lakes (3) Lowering of pH of soil (4) Industrial smog formation
Last Answer : (1) Depletion of fossil fuel reserves Explanation: The oxide of Sulphur (Sulphur Dioxide) is washed down on earth as acid rain.
Description : Oxide of sulphur present in the atmosphere are washed down by rains to cause : (1) Depletion of fossil fuel reserves (2) Eutrophication in lakes (3) Lowering of pH of soil (4) Industrial smog formation
Last Answer : Depletion of fossil fuel reserves
Description : Assertion A. : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other ... of A C. A is true but R is false D. A is false but R is true
Last Answer : ANS: A