1. The correct sequence of the decreasing order of abundance of the given elements in the Earth’s crust is:
A. iron, oxygen, silicon, aluminium
B. oxygen, aluminium, silicon, iron
C. silicon, oxygen, iron, aluminium
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D. oxygen, silicon, aluminium, iron
2. Consider the following statement about the Himalayan orogeny:
(i) The orogeny resulted from the southward movement of the Indian plate
(ii) The orogeny began about 25 million years ago
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(iii) The orogeny closed about 1 million year ago
(iv) The Himalaya has a root of relatively light crustal rock projecting in the denser mantle
Of the statements:
A (i) and (ii) are correct
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B. (iii) and (iv) are correct
C. (i) and (iii) are correct
D. (ii) and (iv) are correct
3. Which one of the following statement is true of braided stream?
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A. Width of channel is less than its depth
B. Width and depth of a channel are equal
C. Width of channel is greater than the depth
D. Width and depth of a channel are unrelated
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4. Consider the following plagic deposits:
(i) Diatom ooze
(ii) Globigerina ooze
(iii) Pteropod ooze
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(iv) Radiolarian ooze
The correct sequence of occurrence of these pelagic deposits with increasing depth of the ocean is:
A. (iii), (ii), (iv), (i)
B. (ii), (iii), (i), (iv)
C. (iii), (ii), (i), (iv)
D. (ii), (iii), (iv), (i)
5. Which one of the following pairs of metals is commonly associated with copper ores?
A. Gold and molybdenum
B. Tin and lead
C. Manganese and chromium
D. Platinum and nickel
6. In a vertical section across a sulphide deposit, the site representing the best situation for supergene enrichment would be:
A. above the water table
B. below the water table
C. in the oxidation zone
D. in the zone rich in humus
7. Who coined the term “Chronobiology”?
A. Franz Halberg
B. M.K. Chandrasekhar
C. D.S. Farner
D. E.Bunning
8. Acid rain is due to:
A production of SO, gas
B. SO, gas converted to H2S04
C. production of CO,
D. Hydrocarbon containing varying amount of hydrogen and carbon
9. If nocturnal animal in the light dark cycle of 12 h light and 12 h darkness kept in constant darkness for 10 days, then what will happen to the onset of its daily activities?
A. start earlier than what was before
B. start later than what was before
C. no change in the activity time
D. activities remain on throughout the dark period
10. Whenever there is high BOD, DO is less so much that fish cannot survive, because:
A. Fish utilize all oxygen
B. Bacteria utilize all oxygen
C. Algae utilize all oxygen
D. Biological compounds are toxic to fish
11. The drinking water contaminated with E.Coli is not safe even after ordinary filtration, but if subjected to RO treatment it is much safe, because:
A. RO treatment kills bacteria
B. RO treatment generates 03 that kill bacteria
C. There is a filtration at molecular level in RO system
D. RO treatment generate chlorine gas that kills bacteria
12. In a water body, there was food chain starting from planton to eagle. 0.3 PPT DDT was the concentration in the water, but in eagle’s body it was found to be 25 PPM, This:
A. phenomenon is called as bioabsorption
B. phenomenon is called as biodesorption
C. phenomenon is called as biomagnification
D. phenomenon is called as biotransformation
14. You are estimating a ‘X’ compound by colorimetry. Final, stable colour is pink. Which filter you will use to record your reading? Filter having maximum transmission at:
A. 420 nm
B. 540 nm
C. 660 nm
D. 700 nm
15. Carbon monoxide is poisonous to human because:
A. It causes mutations
B. It is very soluble in blood
C. It is combustible gas
D. It strongly binds to heme
16. Separation of compounds in Gas Chromatography (GC) depends upon:
A. Molecular weight
B. Solubility in carrier gas
C. Solubility in stationary phase
D. Solubility in carrier gas and liquid phase
17. To understand the 3D structure of the molecule following technique is used:
A. X ray diffraction
B. Atomic absorption spectrophotometry
C. MPTLC
D. GC – MS/MS
18. Which element cannot be estimated by flame photometry?
A. Na+
B. K
C. Li
D. Fe
19. Electrophoresis cannot resolve molecules like:
A. Proteins
B. Nucleic Acids
C. DNA fragments
D. Simple lipids
20. Which of the following instrument is most suitable to estimate heavy metals from the effluent?
A. Chromatography
B. Atomic Absorption spectrophotometer
C. Flame photometer
D. Electrophoresis
21. Which compound initiates the curling of root hairs in legumes?
A. IAA
B. Gibberellin
C. Ethylene oxide
D. Auxin
22. Which one of the following is the microsymbiont in Azolla – Anabaena symbiosis?
A. Azolla
B. Anabaena
C. None of the above
D. Both (A) and (B)
23. Which of the following bacterium produces Bt toxin?
A. Bacillus subtilis
B. Bacillus thrungenesis
C. Bacillus stereotlierniopliillus
D. Bacillus thermoruber
24. The scientist who got the first patent for genetically modified bacterium used for biodegradation of oil:
A. Wickerham
B. Chakraborty
C. Khurana
D. Beijernick
25. Leguminous plants are recommended for rotation of crops, because they:
A. kill insects
B. require little amount of water
C. help in nitrogen fixation
D. is cash crops
26. The compounds responsible for the proliferation of algal blooms in water bodies are:
A. Nitrates and chlorides
B. Nitrates and phosphates
C. Phosphates and silicates
D. Nitrates and carbonates
27. Which of the chlorine compound is used for the disinfection of municipal supply water?
A. Hypochlorite
B. Calcium chloride
C. Potassium permanganate
D. Magnesium chloride
38. Cost – Benefit Analysis seeks to analyse cost and benefits of a project in terms of:
A. Monetary gains
B. Social gain/loss
C. Environmental and monetary gains/losses
D. Social and Environmental costs and gains
39. The size distribution of suspended particulate matter in urban environment tends to follow which of the following distributions:
A. Binomial
B. Poisson
C. Normal
D. Log normal
41. Precautionary principle is a guiding rule in:
A. Cost benefit analysis
B. Cost effective analysis
C. Environmental impact analysis
D. Environmental Audit
42. A company or organization can go to ISO 14000 certification provided it has an ongoing
Environmental Management System in operati6n for at least:
A. 3 months
B. 6 months
C. 1 year
D. 5 years
44. For dumping of radioactive nuclear waste which of the following is the recommended site:
A. Saltmines
B. Oceans
C. Deserts
D. River beds
45. Which of the following coal types has the highest calorific value?
A. Peat
B. Lignite
C. Anthracite
D. Bituminous
46. Which is the largest ecosystem in the world?
A. Forests
B. Deserts
C. Oceans
D. Rivers
47. Which is the most abundant element in hot water springs?
A. nitrogen
B. sulphur
C. carbon
D. phosphorous
48. Assertion (A): Tropospheric ozone exists in urban areas.
Reason (R): The photochemical reactions involving oxides of nitrogen produces 03.
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true
49. A protein can be formed from any sequence of amino acids. How many different sequences can be obtained from a protein composed of 100 amino acids?
A. 100
B. 10020
C. 10040
D. 20100
50. The last Earth Summit was held in which city?
A. Rio de Janeiro
B. Kyoto
C. Hague
D. Johannesburg
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