B:-Above 30 db
C:-Above 120 db
D:-Above 100 db
Correct Answer:- Option-A
Question88:-'Solar ponds' function on the basis of
A:-Photonics
B:-Non-convection
C:-Transpiration
D:-Convection
Correct Answer:- Option-B
Question89:-Tundra is
A:-Treeless biome
B:-Rich in Conifers
C:-Rich in Pine trees
D:-A desert
Correct Answer:- Option-A
Question90:- convention banned the world wide use of endosulfan.
A:-Geneva
B:-Nairobi
C:-Basel
D:-Stockholm
Correct Answer:- Option-A
Question91:-'’Knock-knee syndrome' is due to
A:-Arsenic toxicity
B:-Cadmium toxicity
C:-Fluoride toxicity
D:-Selenium toxicity
Correct Answer:- Option-C
Question92:-The common coagulant used in water treatment is
A:-*(CasO_(4)) (2)."2H_(2)0"
உலை ॥ (2)0
© 4 (2) (60 (की) ` 3. 141 (2107
ம COOH
Correct Answer:- Option-C
Question93:-Secchi discs are used in studies.
A:-Water quality
B:-Microbiological
C:-Air quality
D:-Quadrate
Correct Answer:- Option-A
Question94:-'Pyrology’ is the study of
A:-Distribution of animals in relation to temperature
B:-Role of fire in ecology
C:-Distribution of plants in forests in relation to light
D:-Variation in species distribution in relation to ambient temperature
Correct Answer:- Option-B
Question95:-Through a chemical process coal is converted to a liquid/gas fuel known as
A:-Coal fuel
B:-Natural fuel
C:-Oil shale
D:-Synfuel
Correct Answer:- Option-D
Question96:-OTEC is a technology for
A:-Conservation of Ocean biodiversity
B:-Prevention of marine pollution
£ remediation of ocean oil spill
D:-Obtaining energy from ocean
Correct Answer:- Option-D
Question97:-'Albedo’ is