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 are the examples of fluorinated gases?
1. hydrofluorocarbons (HFCs)
2. perfluorocarbons (PFCs)
3. sulfur hexafluoride (SF6)
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 1 & 3
[C] Only 2
[D] 1, 2 & 3
Show Answer
Correct Answer: D [1, 2 & 3]
Notes:
Fluorinated gases are man-made gases that can stay in the atmosphere for centuries . They contribute to global warming. There are three main categories of fluorinated gases—
1. hydrofluorocarbons (HFCs),
2. perfluorocarbons (PFCs), and
3. sulfur hexafluoride (SF6).
42. Sulfur hexafluoride is used in which of the following industries?
1) Magnesium processing
2) Semiconductor manufacturing
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Sulfur hexafluoride also called SF6 is one of the types of Fluorinated gas that has very high global warming potentials (GWPs) relative to other greenhouse gases. Sulfur hexafluoride is used in magnesium processing and semiconductor manufacturing industries.
43. Which of the following statements are correct regarding Climate forcings?
1) Negative forcings warm the earth
2) Positive forcings cool the earth.
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: D [Neither 1 & 2]
Notes:
Climate “forcings” are the factors that either increase the effects on the climate system or decrease the effects on the climate system. Positive forcings warm the earth while negative forcings actually cool the earth.
44. Which of the following stages are comprised in 2006 Amendment to Environment Impact Assessment cycle?
1. Screening
2. Scoping
3. Public hearing
4. Appraisal
Select the correct option from the codes given below:
[A] Only 1, 3 & 3
[B] Only 2, 3 & 4
[C] Only 1, 3 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [1, 2, 3 & 4]
Notes:
The following four stages are comprised in 2006 Amendment to Environment Impact Assessment cycle:
1. Screening
2. Scoping
3. Public hearing
4. Appraisal
45. Which of the following statements is/are correct regarding Plasticulture?
1) It is the practice of using plastic materials in Road construction.
2) Polyethylene (PE) is mostly used by the majority of people.
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: B [Only 2]
Notes:
Plasticulture refers to the practice of using plastic material in agricultural applications. They are also referred to as ag Plastics. Polyethylene (PE) is mostly used by the majority of people due to its easy availability.
46. Which of the following three ‘R’s are regarded as environment friendly?
[A] Reduce, Reuse, Recycle
[B] Read, Register, Recall
[C] Reduce, Rebuild, Restrict
[D] Random, Reduce, Recall
Show Answer
Correct Answer: A [Reduce, Reuse, Recycle]
Notes:
The three R’s of eco-friendly living are: Reduce, Reuse and Recycle. They all help to cut down on the amount of waste, we throw away. They conserve natural resources, landfill space and energy.
47. Which among the following can be termed as a “dynamic living entity”?
[A] Tree
[B] Water
[C] Forest
[D] Air
Show Answer
Correct Answer: C [Forest]
Notes:
Forests are home to a large number of plants and animals. They are the “green lungs” and serve as water purifying systems of nature. In a forest, there are various types of interactions that occur between the living and the non-living components. The oxygen released during photosynthesis is used by the animals for respiration. In this way, plants and animals help in maintaining the balance of oxygen and carbon dioxide in the atmosphere. Therefore, forests can be considered as a dynamic living entity.
48. Microbial degradation of nitrates into atmospheric nitrogen is known as _____:
[A] Ammonification
[B] Denitrification
[C] Nitrification
[D] Putrefaction
Show Answer
Correct Answer: B [Denitrification]
Notes:
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It involves nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
49. What is green house effect?
[A] Turning of house green because of algae cover
[B] Warming of earth because of trapping of radiations by the earths atmosphere
[C] Turning of house green because of green component of white light
[D] None of the above
Show Answer
Correct Answer: B [Warming of earth because of trapping of radiations by the earths atmosphere]
Notes:
The greenhouse effect is the process by which radiation from a planet’s atmosphere warms the planet’s surface to a temperature above what it would be without its atmosphere. It caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air.
50. In which country would you find the Okavango Delta, a sanctuary for endangered species such as cheetahs, black and white rhinoceros, and African wild dogs?
[A] Botswana
[B] South Africa
[C] Namibia
[D] Zimbabwe
Show Answer
Correct Answer: A [Botswana]
Notes:
The Okavango Delta in Botswana was inscribed as the 1000th UNESCO World Heritage Site in 2014. This inland delta, formed by the Okavango River, spans 6-15,000 square kilometers undergoing seasonal flooding. It is a refuge for over 260,000 mammals and 400 bird species, including endangered species. The delta’s unique ecosystem provides a source of fresh water, food, and job opportunities through tourism while supporting indigenous communities. Ensuring biodiversity and sustainable livelihoods is the focus of the 2008 Okavango Delta Management Plan. With over 150,000 islands, Chief’s Island is the largest, demonstrating the delta’s exceptional natural beauty and ecological significance.
