UPSC Prelims Paper 1 2025 Prelims Paper 1 Prelims question paper with pdf answer key

11.

Consider the following statements
Statement I: Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.
Statement II: Silica-bearing clay is mixed with limestone while manufacturing cement.
Statement III: Limestone is converted into lime during clinker production for cement manufacturing.
Which one of the following is correct in respect of the above statements?

A.

Both Statement II and Statement III are correct and both of them explain Statement I

B.

Both Statement II and Statement III are correct but only one of them explains Statement I

C.

Only one of the Statements II and Statement III is correct and that explains Statement I

D.

Neither Statement II nor Statement III is correct

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12.

Consider the following statements:
Statement I: At the 28th United Nations Climate Change Conference (COP28), India refrained from signing the 'Declaration on Climate and Health'.
Statement II: The COP28 Declaration on Climate and Health is a binding declaration; and if signed, it becomes mandatory to decarbonize the health sector.
Statement III: If India's health sector is decarbonized, the resilience of its health-care system may be compromised.
Which one of the following is correct in respect of the above statements?

A.

Both Statement II and Statement III are correct and both of them explain Statement I

B.

Both Statement II and Statement III are correct but only one of them explains Statement I

C.

Only one of the Statements II and III is correct and that explains Statement I

D.

Neither Statement II nor Statement III is correct

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13.

Consider the following statements:
Statement I: Scientific studies suggest that a shift is taking place in the Earth's rotation and axis.
Statement II: Solar flares and associated coronal mass ejections bombarded the Earth's outermost atmosphere with tremendous amount of energy.
Statement III: As the Earth's polar ice melts, the water tends to move towards the equator.
Which one of the following is correct in respect of the above statements?

A.

Both Statement II and Statement III are correct and both of them explain Statement I

B.

Both Statement II and Statement III are correct but only one of them explains Statement I

C.

Only one of the Statements II and III is correct and that explains Statement I

D.

Neither Statement II nor Statement III is correct

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14.

Consider the following statements:
Statement I: Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change.
Statement II: Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets.
Statement III: Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets.
Which one of the following is correct in respect of the above statements?

A.

Both Statement II and Statement III are correct and both of them explain Statement I

B.

Both Statement II and Statement III are correct but only one of them explains Statement I

C.

Only one of the Statements II and III is correct and that explains Statement I

D.

Neither Statement II nor Statement III is correct

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15.

Which one of the following launched the ‘Nature Solutions Finance Hub for Asia and the Pacific'?

A.

The Asian Development Bank (ADB)

B.

The Asian Infrastructure Investment Bank (AIIB)

C.

The New Development Bank (NDB)

D.

The International Bank for Reconstruction and Development (IBRD)

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16.

With reference to 'Direct Air Capture' (DAC), which of the following statements is/are correct?
I. It can be used as a way of carbon sequestration.
II. It can be a valuable approach for plastic production and in food processing.
III. In aviation, it can be a source of carbon for combining with hydrogen to create synthetic low-carbon fuel.
Select the correct answer using the code given below.

A.

I and II only

B.

III only

C.

I, II and III

D.

None of the above statements is correct

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17.

Regarding Peacock tarantula (Gooty tarantula), consider the following statements:
I. It is an omnivorous crustacean.
II. Its natural habitat in India is only limited to some forest areas.
III. In its natural habitat, it is an arboreal species.
Which of the statements given above is/are correct?

A.

I only

B.

I and III

C.

II only

D.

II and III

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18.

Consider the following statements:
I. Carbon dioxide (CO₂) emissions in India are less than 0.5 t CO₂/ capita.
II. In terms of CO₂ emissions from fuel combustion, India ranks second in the Asia-Pacific region.
III. Electricity and heat producers are the largest sources of СО₂ emissions in India.
Which of the statements given above is/are correct?

A.

I and III only

B.

II only

C.

II and III only

D.

I, II and III

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19.

Consider the following pairs:

Plant	Description
I. Cassava	Woody shrub
II. Ginger	Herb with pseudostem
III. Malabar spinach	Herbaceous climber
IV. Mint	Annual shrub
V. Papaya	Woody shrub

How many of the above pairs are correctly matched?

A.

Only two

B.

Only three

C.

Only four

D.

All the five

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20.

With reference to the planet Earth, consider the following statements:
I. Rain forests produce more oxygen than that produced by oceans.
II. Marine phytoplankton and photosynthetic bacteria produce about 50% of the world's oxygen.
III. Well-oxygenated surface water contains several folds higher oxygen than that in atmospheric air.
Which of the statements given above is/are correct?

A.

I and II

B.

II only

C.

I and III

D.

None of the above statements is correct

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2025 Prelims Paper 1 UPSC Question Paper

2025 Prelims Paper 1 UPSC Questions