- Ozone layer is mainly found in the lower stratospheric layer, more appropriately 25
km height from the ground - Troposphere and stratosphere contain 99 % of the total mass of the atmosphere
- World agriculture started about – 10,000 years back
- Indian agriculture started about – 6000 years back
- First biosphere reserve in India is – Nilgiri biosphere reserve
- Among different Biogeochemical cycle, only phosphorus does not have any
atmospheric reservoir - “Red Data Book” related to categories of threatened, endangered, extinct species
- Biogas contain 50-60 % methane
- Green house gases – Co2, CH4, N2O, CFC
- Of all the green house gases carbon dioxide contributes for maximum in Global
warming - Green house gas produced in rice field is – Methane
- Jatropha is used to produce “Bio fuel”
- Itai-Itai and Manimata disease is due to Cadmium and Mercury Toxicity.
- Kyoto protocol signed in 1997, adopted in 2005.
- 1 kg weight fish has 1 80 mg DDT in body what be in ppm – 80ppm
- Which chemical is used for preservation – benzoic acid
- After Bhopal gas tragedy use of which pesticide was banned – Aldicarb
- Lactose is – glucose + glactose
- Blue asbestos has – sodium iron silicate
- In lithosphere which has maximum concentration: Fe/O/Si/Na
(46.6%)>Si (27.72%)>Al (8.13%)>Fe (5%)>Ca (3.63%)>Na (2.83%)>K
(2.59%)>Mg (2.09%) up to 16 Km of earth crust. - Upper 5 Km of earth crust contain 74% i.e. 3/4th Sedimentary rocks(shale 52%+sand
stone 15%+limestone & dolomite 7%), 18% Igneous rocks (granite 15% + basalt
3%) and 8% other rocks are found in whole earth crust contain 95% igneous rocks
and 5% sedimentary rocks (shale 4%, and sandstone 0.75%, limestone 0.025%) - Biodiesel is produced from: trans-esterification of vegitable/animal lipid or oil is a
monoalkyl ester of long chain fatty acid - Ethanol is produced from: fermentation of charbohydrate containing matter eg Corn,
Sugar cane - In India 10% blending is done in gasoline.
- Metals have: unfilled ‘d’ orbital,
- Acid rain has pH: 5.6
- Cattle population per 100 Km2 is maximum in: Haryana
- Orange is resistant to: a) HF, b) NH3, c) NO2, d) SO2
- Cd is present in which fertilizer: phosphatic fertilizer
- Natural radiation contribute what % of total radiation – 83%
- Who said environment can satisfy the need not the greed: Mahatma Gandhi
- Fecundity means: ability to reproduce
- Ability to maintain internal stability is called: Homeostasis\
- Agent Orange is the code name for a herbicide and defoliant—contaminated
with TCDD - N2O can be detected by: ECD
- Spectrophotometer is based on principle of: absorption spectrum
- Biogas contain: 60% Methane and 40% carbon dioxide
- Bird evolves in- Jurassic period (150 millions year ago)
- Coca cola contain SnCl2 which is: emulsifier/ antioxidant/ stabilizer ans-b
- Largest source of S is: volcanic eruption
- Definition of Niche: functional role of a species in an ecosystem
- Cybernetics: science of control or regulation
- Vienna convention on protection of ozone layer was held in year: 1985
- Highest CEC in which soil: clay
- Degradation of pesticide is maximum in which soil : clay
- Denitrification occur in which type of soil: water logged/ anaerobic condition
- Bioaccumulation occur due to: fat or lipid solubility
- Traditional detergent contain: phosphorus
- What get leaked in ship wreck at Haldia in 1993– soda ash
- Radioactive nuclei involved in Delhi health hazard in 2010- Co-60, gamma radiation
- Full form of PCBs: polychlorinated biphenyls
- SQI – soil quality indicator
- What is bio-concentration factor (BCF) – % of bioaccumulative substances in tissue
of aquatic organism in relation to concentration of that substance in to environment
i.e. water whwre organism live = Corg/Cinv X 100, assume accumulation is through
water only - BAF – bio accumulation factor – assume both organism and their food are equally
exposed - % of water in ocean: 97.5%
- Fresh water = 2.5% (2% cryosphere or ice, 0.4% ground water, 1% lake (0.02), soil
(0.005), atmosphere (0.0005), river (0.0001), & biota water - Maximum fresh water trapped in: ice cap
- C-14 is emitter of which ray: α/ β/ γ ans- β
- Fluoride problem is maximum in which state: Rajasthan
- Sink of Pb is: smelter/coal
- Difference between point source and non point source of pollutants
- Point source – easily identifiable – sewage/industrial/commercial waste
discharge - Non – point source – diffused not easily identifiable – runoff /
agriculture/atmospheric fall
- Point source – easily identifiable – sewage/industrial/commercial waste
- Fog is: liquid (water) in gas/ solid in gas/liquid in liquid ans- liquid in gasIn photochemical smog which has maximum concentration: ozone
- Recently recognized hot spot in India: NE Himalya
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