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Environment & Ecology - MOST IMPORTANT CDS Previous Year Questions

Practice real questions from previous year exams of CDS.

📘 National Organizations📚 National Green Tribunal

Q1

Which one of the following statements about the National Green Tribunal is not correct?

🎯 CDS (I) 2019

A.

It was set up in the year 2010

B.

It is involved in effective and expeditious disposal of cases relating to environmental protection and conservation of forests

C.

It may consider giving relief and compensation for damages to persons and property

D.

It is bound by the procedures laid down under the Code of Civil Procedure, 1908

📘 Global Conservation Efforts📚 Rio+20 (United Nations Conference on Sustainable Development), 2012

Q2

'Rio + 20' is the short name for

🎯 CDS (II) 2015

A.

Millennium Development Goals

B.

United Nations Conference on Sustainable Development

C.

Earth summit

D.

Post-2015 Development Agenda

📘 Sustainable Development📚 Definition and General Facts

Q3

The concept of sustainable development relates to

🎯 CDS (I) 2010

A.

Consumption levels

B.

Exhaustible resources

C.

Social equity

D.

Intergenerational equity

📘 Coral Reefs📚 Types of Coral Reefs

Q4

The largest barrier reef system in the world is found at

🎯 CDS Exam (II), 2020

A.

East Australian Coast

B.

West Australian Coast

C.

North Australian Coast

D.

South Australian Coast

📘 Coral Reefs📚 Types of Coral Reefs

Q5

Which one among the following is not a coral reef island?

🎯 CDS Exam (II), 2020

A.

Great Barrier Reef, Australia

B.

Rainbow Reef, Fiji

C.

Swaraj Island, India

D.

Kyushu Island, Japan

📘 Waste Management📚 Misc

Q6

Which one among the following groups of items contains only biodegradable items?

🎯 CDS (I) 2011

A.

Wood, Grass, Plastic

B.

Wood, Grass, Leather

C.

Fruit peels, Lime juice, China clay cup

D.

Lime juice, Grass, Polystyrene cup

📘 In Situ Conservation – Protected Areas📚 Biosphere Reserves

Q7

Which one of the following Biosphere Reserves is spread over three states in India?

🎯 CDS (I) Exam 2024

A.

Manas

B.

Pachmarhi

C.

Agasthyamalai

D.

Nilgiri

📘 In Situ Conservation – Protected Areas📚 Biosphere Reserves

Q8

Which one of the following statements on biosphere reserves is not correct?

🎯 CDS (I) 2010

A.

In 1973, UNESCO launched a worldwide programme on man and biosphere

B.

Biosphere reserves promote research on ecological conservation

C.

Nanda Devi Biosphere Reserve is located in Madhya Pradesh

D.

Biosphere reserves are multipurpose protected areas to preserve the genetic diversity in ecosystems

📘 Basics of Environment & Ecology📚 Definitions - Environment, Ecology

Q9

A biological community in its environment such as a pond, an ocean, a forest, even an aquarium is known as:

🎯 CDS (II) 2017

A.

Biome

B.

Community

C.

Abiotic environment

D.

Ecosystem

📘 Ecosystem - Function & Services📚 Functions of Ecosystem

Q10

Energy and nutrients flow from one trophic level to another in an ecosystem. Which one of the following statements correctly describes the direction of flow of energy and nutrients in as ecosystem?

🎯 CDS (II) Exam 2023

A.

Energy flow is cyclic and nutrient flow is unidirectional

B.

Energy flow is unidirectional and nutrient flow is cyclic

C.

Both energy and nutrient flow are unidirectional

D.

Both energy and nutrient flow are cyclic

📘 Food Chain, Food Web & Ecological Pyramids📚 Food Chain and its Types

Q11

Food chain is

🎯 CDS (II) 2019

A.

relationship between autotrophic organisms

B.

exchange of genetic material between two organisms

C.

passage of food (and thus energy) from one organism to another

D.

modern entrepreneur establishment providing food outlets

📘 Ecosystem - Function & Services📚 Functions of Ecosystem

Q12

Which one among the following statements is not correct?

🎯 CDS (I) 2012

A.

Trophic dynamics represents the transfer of energy from one trophic level to another in a food chain

B.

In deeper parts of oceans, primary production remains almost nil

C.

The primary consumers are called autotrophs

D.

The decomposers are called saprotrophs

📘 Sustainable Development📚 Sustainable Development Goals (UN)

Q13

Long-Term Low Emissions Development Strategy envisions: 1. a transition from fossil fuels in a just, smooth, sustainable manner. 2. increased use of bio-fuels. 3. climate resistant urban development. 4. financing of sustainable development through Green Bonds. Select the answer using the code given below:

🎯 CDS-II -2024

A.

1 and 2 only

B.

1, 2 and 3

C.

2 and 4 only

D.

1, 3 and 4

📘 Other Types of Pollution📚 Plastic Pollution

Q14

The use of plastics has led to a number of environment-related problems. For this, which one of the following statements is correct?

🎯 CDS (I) Exam 2024

A.

They are non-biodegradable

B.

They do not get released into water and food

C.

They do not have any biochemical synthesis activity.

D.

They are harmless to humans.

📘 Pollution - Introduction📚 Types of Pollution

Q15

Which one of the following is not biodegradable?

🎯 CDS (I) 2010

A.

Woollen mat

B.

Silver foil

C.

Leather bag

D.

Jute basket

📘 Air Pollution - Introduction📚 Examples of Air Pollutants

Q16

Which one among the following industries produces the most non-biodegradable wastes?

🎯 CDS (I) 2011

A.

Thermal power plants

B.

Food processing units

C.

Textile mills

D.

Paper mills

📘 Effects of Air Pollution📚 Smog

Q17

Which one of the following is the most important factor for the formulation of smog?

🎯 CDS Exam-I : 2022

A.

Long winter nights

B.

Formation of an ‘inversion lid’

C.

Presence of many air pollutant resources

D.

Rapid fall in temperature with increasing height above the sea level

📘 Air Pollution - Introduction📚 Misc

Q18

Which one of the following plants is popularly grown along the road for absorbing vehicular pollutants?

🎯 CDS (I) 2010

A.

Nerium

B.

Neem

C.

Bougainvillea

D.

Calotropis

📘 Ozone Depletion📚 Effects of Ozone Layer Depletion

Q19

Match List I with List II and select the correct answer using the code given below the Lists: List I (Air Pollutant) A. Chlorofluorocarbon B. Sulphur dioxide C. Lead compound D. Carbon dioxide List II (Effect) 1. Acid rain 2. Depletion of ozone layer in the atmosphere 3. Harmful for human nervous system 4. Topmost contribution to greenhouse effect

🎯 CDS (I) 2015

A.

A-4, B-3, C-1, D-2

B.

A-4, B-1, C-3, D-2

C.

A-2, B-1, C-3, D-4

D.

A-2, B-3, C-1, D-4

📘 Biodiversity📚 Definition & General Facts

Q20

The variability among living organisms from all sources including terrestrial, marine and other ecosystems and the ecological complexes of which they are part which includes diversity within species, between species of ecosystems refers to:

🎯 CDS (II) 2012

A.

Geographical diversity

B.

Zoological diversity

C.

Ecological diversity

D.

Biological diversity

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