UPSC Prelims 2018 Question Paper & Analysis
Get the UPSC Prelims Previous Year Question (PYQ) Paper with subject-wise trends, difficulty analysis, and detailed model answers — including diagrams, flowcharts, and structured writing for GS.
Subject-wise MCQ Distribution
Difficulty Analysis
Type of questions
Key Insights
- Economy, Environment & Ecology, Indian Polity carried the highest weightage, together accounting for 50% of the paper.
- The paper strongly favoured statement-based questions — multi-statement and assertion-reasoning questions together made up 58% of the paper, making careful reading and elimination especially important.
- The paper was largely easy to moderate in difficulty, with 71% of questions falling in the easy or medium range and only 29% classified as hard.
- Questions were spread across 11 subject areas, making broad syllabus coverage important rather than relying on a few traditionally dominant subjects.
- The question format demanded more than direct recall, with only 42% of questions being direct, while most required evaluating multiple statements or reasoning through assertions.
PYQs with Detailed Answers
- View Answer for: Which of the following leaf modifications occur(s) in the desert areas to inhibit water loss? Hard and waxy leaves Tiny leaves Thorns instead of leavesSelect the correct answer using the code given below:
Which of the following leaf modifications occur(s) in the desert areas to inhibit water loss?
- Hard and waxy leaves
- Tiny leaves
- Thorns instead of leaves
Select the correct answer using the code given below:
- View Answer for: Which of the following has/have shrunk immensely/dried up in the recent past due to human activities? Aral Sea Black Sea Lake Baikal
Which of the following has/have shrunk immensely/dried up in the recent past due to human activities?
- Aral Sea
- Black Sea
- Lake Baikal
- View Answer for: How is the National Green Tribunal (NGT) different from the Central Pollution Control Board (CPCB)? The NGT has been established by an Act whereas the CPCB has been created by executive order of the Government. The NGT provides environmental justice and helps reduce the burden of litigation in the higher courts whereas the CPCB promotes cleanliness of streams and wells, and aims to improve the quality of air in the country.Which of the statements given above is/are correct
How is the National Green Tribunal (NGT) different from the Central Pollution Control Board (CPCB)?
- The NGT has been established by an Act whereas the CPCB has been created by executive order of the Government.
- The NGT provides environmental justice and helps reduce the burden of litigation in the higher courts whereas the CPCB promotes cleanliness of streams and wells, and aims to improve the quality of air in the country.
Which of the statements given above is/are correct
- View Answer for: Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds? Decreased salinity in the river Pollution of groundwater Lowering of the water-tableSelect the correct answer using the code given below :
Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds?
- Decreased salinity in the river
- Pollution of groundwater
- Lowering of the water-table
Select the correct answer using the code given below :
- View Answer for: Why is a plant called Prosopis juliflora often mentioned in the news?
Why is a plant called Prosopis juliflora often mentioned in the news?
- View Answer for: With reference to agricultural soils, consider the following statements : The high content of organic matter in soil drastically reduces its water holding capacity. Soil does not play any role in the sulphur cycle. Irrigation over a period of time can contribute to the salinization of some agricultural lands.Which of the statements given above is/are correct?
With reference to agricultural soils, consider the following statements :
- The high content of organic matter in soil drastically reduces its water holding capacity.
- Soil does not play any role in the sulphur cycle.
- Irrigation over a period of time can contribute to the salinization of some agricultural lands.
Which of the statements given above is/are correct?
- View Answer for: With reference to the 'Global Alliance for Climate-Smart Agriculture (GACSA)', which of the following statements is/are correct. GACSA is an outcome of the Climate Summit held in Paris in 2015. Membership of GACSA does not create any binding obligations. India was instrumental in the creation of GACSA.Select the correct answer using the code given
With reference to the 'Global Alliance for Climate-Smart Agriculture (GACSA)', which of the following statements is/are correct.
- GACSA is an outcome of the Climate Summit held in Paris in 2015.
- Membership of GACSA does not create any binding obligations.
- India was instrumental in the creation of GACSA.
Select the correct answer using the code given
- View Answer for: Consider the following statements: The definition of "Critical Wildlife Habitat" is incorporated in the Forest Rights Act, 2006. For the first time in India, Baigas have been given Habitat Rights. Union Ministry of Environment, Forest and Climate Change officially decides and declares Habitat Rights for Primitive and Vulnerable Tribal Groups in any part of India.Which of the statements given above is/are correct ?
Consider the following statements:
- The definition of "Critical Wildlife Habitat" is incorporated in the Forest Rights Act, 2006.
- For the first time in India, Baigas have been given Habitat Rights.
- Union Ministry of Environment, Forest and Climate Change officially decides and declares Habitat Rights for Primitive and Vulnerable Tribal Groups in any part of India.
Which of the statements given above is/are correct ?
- View Answer for: The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards greener and more inclusive economies, emerged at
The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards greener and more inclusive economies, emerged at
- View Answer for: Which of the following statements best describes "carbon fertilization"?
Which of the following statements best describes "carbon fertilization"?
- View Answer for: "Momentum for Change: Climate Neutral Now" is an initiative launched by
"Momentum for Change: Climate Neutral Now" is an initiative launched by
- View Answer for: The term "sixth mass extinction/sixth extinction" is often mentioned in the news in the context of the discussion of
The term "sixth mass extinction/sixth extinction" is often mentioned in the news in the context of the discussion of
- View Answer for: With reference to the circumstances in Indian agriculture, the concept of "Conservation Agriculture" assumes significance. Which of the following fall under the Conservation Agriculture? Avoiding monoculture practices Adopting minimum tillage Avoiding the cultivation of plantation crops Using crop residues to cover the soil surface Adopting spatial and temporal crop sequencing/crop rotationsSelect the correct answer using the code given below:
With reference to the circumstances in Indian agriculture, the concept of "Conservation Agriculture" assumes significance. Which of the following fall under the Conservation Agriculture?
- Avoiding monoculture practices
- Adopting minimum tillage
- Avoiding the cultivation of plantation crops
- Using crop residues to cover the soil surface
- Adopting spatial and temporal crop sequencing/crop rotations
Select the correct answer using the code given below:
- View Answer for: In which one of the following States is Pakhui Wildlife Sanctuary located?
In which one of the following States is Pakhui Wildlife Sanctuary located?
- View Answer for: With reference to solar power production in India, consider the following statements: India is the third largest in the world in the manufacture of silicon wafers used in photovoltaic units. The solar power tariffs are determined by the Solar Energy Corporation of India.Which of the statements given above is/are correct?
With reference to solar power production in India, consider the following statements:
- India is the third largest in the world in the manufacture of silicon wafers used in photovoltaic units.
- The solar power tariffs are determined by the Solar Energy Corporation of India.
Which of the statements given above is/are correct?
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