- (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
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- (A) CO2
- (B) CH4
- (C) CO
- (D) H2
- (A) Nitric acid
- (B) Sulphuric acid
- (C) Chlor alkali
- (D) Iron & steel
- (A) Industrial chimney exhaust
- (B) Automobiles exhaust
- (C) Photochemical reaction in polluted atmosphere
- (D) Burning of domestic fuel
- (A) Bog iron
- (B) Limestone powder or alkalised alumina
- (C) Silica gel
- (D) Active carbon
- (A) High temperature incineration
- (B) Pathological incineration
- (C) Pyrolysis
- (D) Underground burial in concrete containers
- (A) 84
- (B) 88
- (C) 80
- (D) 92
- (A) Files
- (B) Algae
- (C) Micro-organisms
- (D) Mosquitoes
- (A) 1.8
- (B) 6.2
- (C) 7.3
- (D) 13.4
- (A) Tanneries
- (B) Glass & ceramic
- (C) Beverages
- (D) Any of these
