Environment & Biodiversity MCQs
Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.
41. Which of the following is the health effects of excess fluoride in drinking water?
[A] Toothaches
[B] Lung disease
[C] Fluorosis
[D] Mouth Cancer
Show Answer
Correct Answer: C [Fluorosis]
Notes:
Exposure to high concentrations of fluoride is the reason for a serious disease called fluorosis. It is a public health problem caused by excess intake of fluoride through drinking water, food products, and industrial pollutants over a long period.
42. Which amendment to the Water (Prevention and Control of Pollution) Act, 1974 empowered SPCB and CPCB to close a defaulting industrial plant?
[A] Amendment, 1988
[B] Amendment, 1990
[C] Amendment, 1992
[D] None of the above
Show Answer
Correct Answer: A [Amendment, 1988]
Notes:
The Amendment of 1988 to the Water (Prevention and Control of Pollution) Act, 1974 empowered SPCB and CPCB to close a defaulting industrial plant. The Act prohibits the use of any stream or well for disposal of polluting matter.
43. Which of the following is the primary greenhouse gas emitted through human activities?
[A] Methane
[B] Carbon dioxide
[C] Carbon Monoxide
[D] Water vapour
Show Answer
Correct Answer: B [Carbon dioxide]
Notes:
Carbon dioxide is naturally present in the atmosphere as a part of the Earth’s carbon cycle. It is also the primary greenhouse gas which is emitted through human activities.
44. Which of the following statements regarding Ocean acidification are correct?
1) Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time.
2) The major cause is Carbon Dioxide from the atmosphere.
3) Harm life forms that rely on carbonate-based shells and skeletons
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: D [1, 2 & 3]
Notes:
Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time of which the major cause is Carbon Dioxide from the atmosphere. It is Harmful for the life forms that rely on carbonate-based shells and skeletons.
45. Which of the following provides information about the level of harm by a hazard?
1) Magnitude of the hazard
2) Frequency of the hazard
3) Intensity at the impact point
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2 & 3
[C] Only 1 & 2
[D] 1, 2, & 3
Show Answer
Correct Answer: D [1, 2, & 3]
Notes:
The post-analysis of any disaster is most important so as to prepare ourselves for the next one. Three methods are used to determine the level of Hard by any man-made or natural hazard which includes:
1) Magnitude.
2) Frequency and
3) Intensity
46. Which of the following methods can be helpful in preventing floods?
[A] Deforestation
[B] Afforestation
[C] Tilling of land
[D] Removing the top soil
Show Answer
Correct Answer: B [Afforestation]
Notes:
A flood is an overflow of water that submerges the low lying lands. Some of the reasons which are responsible for floods are deforestation, tilling of land, etc. Afforestation is a method that can be helpful in preventing floods.
47. Which of the following diseases are due to water pollution?
[A] Cholera
[B] Typhoid
[C] Both Cholera and Typhoid
[D] Neither Cholera Nor Typhoid
Show Answer
Correct Answer: C [Both Cholera and Typhoid]
Notes:
Waterborne diseases are conditions caused by pathogenic micro-organisms that are transmitted in water as Cholera and Typhoid. Cholera is an infection of the small intestine by some strains of the bacterium Vibrio cholerae. Typhoid fever is caused by bacterium Salmonella Typhi.
48. Spraying of DDT on crops causes pollution of _____:
[A] Air & Water
[B] Air & Soil
[C] Crops & Air
[D] Soil & Water
Show Answer
Correct Answer: D [Soil & Water]
Notes:
DDT (Dichloro-diphenyl trichloro ethane) is a persistent organic pollutant that is readily adsorbed into soils and sediments, which can act both as sinks and as long-term sources of exposure affecting organisms. It pollutes the ground water system which contaminates the entire food chain by severely affecting humans dependent on these.
49. Which of the following item is not included in Environmental Auditing?
[A] Scrutiny by the government agencies
[B] Pollution monitoring schemes
[C] Safety provisions for industrial workers
[D] Storage of toxic chemicals
Show Answer
Correct Answer: A [Scrutiny by the government agencies]
Notes:
Environmental auditing is a systematic, documented, periodic and objective process in assessing an organization’s activities and services in relation to: Assessing compliance with relevant statutory and internal requirements. Facilitating management control of environmental practices. Scrutiny by the Government agencies is not included in the Environmental Auditing
50. The “Loktak” lake is located in which state of India?
[A] Manipur
[B] Meghalaya
[C] Tripura
[D] Mizoram
Show Answer
Correct Answer: A [Manipur]
Notes:
Loktak lake is located near Moirang in Manipur. It is the largest freshwater lake in North -East India. It is famous for the phumdis floating over it. Keibul Lamjao, the only floating national park in the world, floats over the Loktak Lake.
