Removal of __________ is accomplished by aeration of water. Suspended solids Dissolved gases None of these Dissolved solids TRUE ANSWER : ? YOUR ANSWER : ?
__________ substances present in sewage are removed in grit chamber during sewage treatment. Dissolved Fatty Inorganic Organic TRUE ANSWER : ? YOUR ANSWER : ?
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called Thermosphere Troposphere Mesosphere Stratosphere TRUE ANSWER : ? YOUR ANSWER : ?
The resistance of water to the passage of light through it is a measure of the Turbidity Color Dissolved gases Hardness TRUE ANSWER : ? YOUR ANSWER : ?
__________ plant emits large amount of SO₂ as an air pollutant. Chloralkali Nitric acid Sulphuric acid Iron & steel TRUE ANSWER : ? YOUR ANSWER : ?
Inhalation of silica dust by human being causes Both B & C Tuberculosis Asphyxiation Shortness of breath TRUE ANSWER : ? YOUR ANSWER : ?
Photochemical smog is formed from automobile exhaust All of these Appears only on sunny days By reaction of hydrocarbon & nitric oxide in presence of sunlight Is harmful for crops and trees also besides causing eye irritation & asthma TRUE ANSWER : ? YOUR ANSWER : ?
The main type of sludge gas evolved during sewage treatment in Imhoff tank is CH₄ H₂ CO CO₂ TRUE ANSWER : ? YOUR ANSWER : ?
The Killer gas which caused Bhopal gas tragedy in 1984 was Carbon monoxide Phosgene Methyl iso-cynate (MIC) Sulphur dioxide TRUE ANSWER : ? YOUR ANSWER : ?
Aerosols present in atmospheric air may be Combination of all A, B & C Positively charged Negatively charged Neutral TRUE ANSWER : ? YOUR ANSWER : ?