Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________________?
(A) Blood poisoning
(B) Anaemia
(C) Nervous system disorder
(D) All
Higher concentration of CO2 in atmosphere_____________________?
(A) Allows visible solar radiation (ultraviolet) of short wave-length to pass through
(B) Reflects and absorbs the longer wavelength (infra-red) radiations
(C) Prevents solar heat being radiated out completely, resulting in ‘heat trap’ i.e., global warming
(D) All
The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?
(A) CO2
(B) CH4
(C) CO
(D) H2
_____________ plant emits large amount of SO2 as an air pollutant?
(A) Nitric acid
(B) Sulphuric acid
(C) Chlor alkali
(D) Iron & steel
‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?
(A) Industrial chimney exhaust
(B) Automobiles exhaust
(C) Photochemical reaction in polluted atmosphere
(D) Burning of domestic fuel
Which of the following is an adsorbent used for the removal of SO2 from gas/air ?
(A) Bog iron
(B) Limestone powder or alkalised alumina
(C) Silica gel
(D) Active carbon
Radioactive solid nuclear wastes are disposed off by _________________?
(A) High temperature incineration
(B) Pathological incineration
(C) Pyrolysis
(D) Underground burial in concrete containers
Growth of ______________ is promoted by the presence of manganese in water?
(A) Files
(B) Algae
(C) Micro-organisms
(D) Mosquitoes