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Environment & Ecology · Unified View

Compare Environment & Ecology questions across Prelims and Mains stages side-by-side with distribution trends.

PrelimsMainsUnified View ⚡
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Comparing 40 questions across stages
Prelims
20questions

Objective / MCQ format

Mains
20questions

Descriptive / Essay format

Stage Ratio
Prelims (50%)Mains (50%)
By Year2020–2026
20
21
22
23
24
25
26
Prelims20 questions
Newest first
2026Protected Areas

A biodiversity hotspot is identified using high endemism and what other criterion?

Answer: D
2025Climate Change

The Montreal Protocol is primarily concerned with substances that deplete what?

Answer: A
2025Pollution

The food chain energy transfer between trophic levels is generally what?

Answer: C
2024Biodiversity

Which gas is the largest contributor to human-caused long-lived greenhouse warming?

Answer: A
2024Conservation

Which of these is an example of an invasive alien species?

Answer: A
2024Climate Change

Which international agreement addresses trade in endangered wild fauna and flora?

Answer: B
2024Conservation

Which energy source is renewable?

Answer: D
2024Conservation

Which of the following is a nature-based climate solution?

Answer: B
2023Biodiversity

Project Tiger was launched primarily to conserve which animal?

Answer: D
2023Biodiversity

The Convention on Biological Diversity was opened for signature at which summit?

Answer: C
2022Climate Change

Ramsar sites are designated for conservation of which ecosystems?

Answer: C
2022Protected Areas

Eutrophication of a lake is commonly caused by excess input of what?

Answer: C
2022Climate Change

Which pollutant is a major precursor of acid rain?

Answer: D
2021Pollution

The ozone layer is mainly located in which atmospheric layer?

Answer: B
2021Pollution

Which Indian law provides a broad framework for environmental protection?

Answer: D
2021Protected Areas

What is the main purpose of wildlife corridors?

Answer: A
2020Pollution

A carbon sink is a system that does what?

Answer: A
2020Protected Areas

Which of the following best describes ecological succession?

Answer: B
2020Conservation

Coral bleaching is commonly triggered by what?

Answer: C
2020Biodiversity

Which biome is characterised by permafrost and low-growing vegetation?

Answer: B
Mains20 questions
Newest first
2026Climate Change

How can urban planning reduce air pollution and heat-island effects?

2026Biodiversity

Evaluate the environmental consequences of groundwater over-extraction.

2025Pollution

Discuss the policy challenges of managing plastic waste.

2025Conservation

Examine the links between public health and environmental quality.

2024Conservation

Evaluate the opportunities and limitations of carbon markets.

2024Protected Areas

Discuss the importance of environmental impact assessment in sustainable development.

2023Protected Areas

Examine the challenges of balancing biodiversity conservation with local livelihoods.

2023Pollution

Discuss the role of wetlands in flood mitigation and biodiversity protection.

2023Protected Areas

Evaluate the role of protected areas in conserving ecological corridors.

2023Climate Change

How can disaster risk reduction be aligned with climate adaptation?

2022Pollution

How can circular-economy principles reduce waste and resource consumption?

2021Protected Areas

How can coastal communities build resilience to sea-level rise?

2021Conservation

How can sustainable agriculture reduce pressure on ecosystems?

2020Biodiversity

Discuss how climate adaptation can be integrated into district-level development planning.

2020Biodiversity

How can India accelerate a just transition from fossil fuels?

2020Climate Change

Examine the causes of human-wildlife conflict and possible mitigation strategies.

2020Conservation

Discuss the role of community participation in forest conservation.

2020Climate Change

Discuss the importance of monitoring and enforcement in pollution control.

2020Pollution

Examine the potential of nature-based solutions for climate resilience.

2020Biodiversity

Discuss the risks posed by invasive alien species to native biodiversity.