A:-Ozone depletion
B:-Melting of permafrost
C:-Glaciations
D:-Greenhouse effect
Correct Answer:- Option-A
Question49:-The maximum amount of water that the soil can hold after the loss of gravitational water is known as
A:-Hygroscopic water
-Field capacity
C:-Capillary water
D:-Stored water
Correct Answer:- Option-B
Question50:-Limnology is a study of
A:-Aging
-Tics and mites
C:-Fresh water bodies
D:-Termites
Correct Answer:- Option-C
Question51:-'Silviculture' refers to the practice of
A:-Honey bee keeping
B:-Growing Silk-worms
C:-Forest management with objective of producing specific plants
D:-Silver fish culturing
Correct Answer:- Option-C
Question52:-An example of fossil fuel is
A:-Wood
B:-Gobar gas
C:-Charcoal
D:-Gasoline
Correct Answer:- Option-D
Question53:-The ecosystem of stagnant fresh water habitat is known as ecosystem.
A:-Standing crop
B:-Lentic
C:-Lotic
D:-Abyssal
Correct Answer:- Option-B
Question54:-'Photochemical smog' is caused by the interaction of
A:-Hydrocarbons and Ozone
B:-Hydrocarbons and *NO_(x)*
C:--NO_(x)° and Ozone
D:-Hydrocarbons, *NO_(x)* and Ozone
Correct Answer:- Option-D
Question55:-'Ramsar Convention' is for
A:-Wetlands
B:-Tropical Forests
C:-Oceans
D:-Mountains
Correct Answer:- Option-A
Question56:-Graphite is used as in
A:-Surface coat, electronic chip
B:-Brush, electronic devices
C:-Moderator, nuclear reactors
D:-Packing material, GC columns
Correct Answer:- Option-C
Question57:-Heliophytes are plants which grow in
A:-Full sunlight
B:-Low intensity of light
C:-Complete darkness
D:-Salt water
Correct Answer:- Option-A