set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 1 EXERCISES
The following question based on ecology and environment awareness topic of general science mcq
(a) Jim Corbett
(b) Kanha
(c) Dudhwa
(d) Bandhavgarh
The correct answers to the above question in:
Answer: (c)
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Read more ecology and environment awareness Based General Science Questions and Answers
Question : 1
Which constituent of the atmosphere is likely to change if the forest cover is removed ?
a) CO2 level is increased
b) O2 level is significantly increases
c) O2 level is increased
d) CO2 level is significantly decreased
Answer »Answer: (a)
Question : 2
Which one is nature's cleaner ?
a) Producers
b) Decomposers and scavengers
c) Consumers
d) Symbionts
Answer »Answer: (b)
Question : 3
More than 70% of world’s freshwater is contained in
a) glaciers and mountains
b) antarctica
c) polar ice
d) greenland
Answer »Answer: (c)
Three fourth the surface of the earth is covered by oceans which contain 97.5% of total water.
It is marine water with about 3.5% salt content only 2.5% is fresh water which occurs on land.
Most of this water (1.97%) occurs from frozen ice caps and glaciers, and 0.5% of fresh water occurs as groundwater.
Rivers and lakes contain 0.02%, soil 0.01% while the atmosphere possesses 0.001% of water as vapours.
Question : 4
Human population growth ________.
a) is currently in a logistic phase
b) is currently exponential
c) has an S-shaped curve
d) has reached carrying capacity
Answer »Answer: (b)
The exponential growth model virtually describes the population explosion of humans.
Question : 5
Which one of the following is not a gaseous biogeochemical cycle in ecosystem ?
a) Phosphorus cycle
b) Nitrogen cycle
c) Sulphur cycle
d) Carbon cycle
Answer »Answer: (a)
Phosphorus is mostly used as phosphate. Its reservoir pool is phosphate rocks while cycling pool is soil for terrestrial ecosystems and water for aquatic ecosystems.
Question : 6
Acid rain is caused due to increase in concentration of (in atmosphere)
a) CO and CO2
b) CO and SO3
c) SO2 and NO2
d) O3 and dust
Answer »Answer: (c)
The main precursors of acid rain are SO2 and NO2 in the atmosphere which form H2 SO4 (Sulphuric acid) and HNO3 (nitric acid) with H2O and these come down with rain.
Such rains are called acid rains.
GET ecology and environment awareness PRACTICE TEST EXERCISES
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