UPSC CSE Prelims 2025 Answer Key Available for GS Paper 1 and 2: Check Detailed Solution

Q: Ques: Can candidates challenge the UPSC Prelims answer key?

Ans: No, UPSC does not provide a facility to challenge the answer key for Prelims.

Q: Ques: How to calculate expected scores using the UPSC prelims answer key?

Ans: Match your answers with the answer key, awarding +2 marks for each correct answer and deducting ⅓ mark (–0.66) for every incorrect response. CSAT is qualifying, so only accuracy matters there.

Q: Ques: Can the preliminary answer key affect the final result declaration?

Ans: No. The final result is declared by UPSC after official evaluation. Answer keys are for candidates’ self-assessment and do not affect official results.

Q: Ques: Where can I find detailed solutions along with UPSC CSE prelims answer key?

Ans: You can find detailed solutions along with UPSC CSE prelims answer key on Prepp.in.

Q: Ques: What happens after clearing the UPSC CSE Prelims 2025? What is the next stage?

Ans: After clearing UPSC CSE Prelims 2025, candidates become eligible to appear for the UPSC Mains exam. The Mains consist of nine papers testing in-depth knowledge and writing skills. Successful candidates in Mains then proceed to the final stage—Personality Test (Interview).

Sakshi Negi

Jul 28, 2025

UPSC Prelims Answer Key 2025 is available here for the Civil Services Examination held on May 25, 2025. UPSC CSE exam is conducted annually in three stages—Prelims, Mains, and Interview—to select candidates for prestigious central government posts such as the Indian Administrative Service (IAS), Indian Police Service (IPS), and Indian Foreign Service (IFS).

Check IAS 2025 Prelims Question Paper: GS Paper 1 and CSAT Paper 2 PDF

UPSC Prelims 2025 Answer Key with Solution PDF

Question Paper	Answer Key PDF	Solution
UPSC GS Prelims Paper 1 Question Paper 2025 PDF	Download PDF	Check Solution
UPSC CSAT Prelims Paper 2 Question Paper 2025 PDF	Download PDF	Check Solution

UPSC CSE Prelims 2025 Exam Analysis

UPSC CSE Prelims 2025 exam was conducted smoothly with a balanced difficulty level across both General Studies Paper 1 and CSAT Paper 2. Questions focused on current affairs, Indian polity, geography, environment, and history, with a notable emphasis on analytical thinking.

The CSAT paper remained qualifying in nature but required good comprehension and reasoning skills. Overall, the exam was moderate, testing both knowledge and application effectively. Candidates found the paper fair but advised thorough preparation for unpredictable questions.

Relevant Links
UPSC IAS Previous Year Papers	IAS Question Paper 2025	IAS Mock Test
UPSC IAS Prelims Question Paper	UPSC IAS Question Paper 2024	UPSC IAS Question Paper 2023

UPSC IAS Answer Key 2025 FAQs

Ques: Can candidates challenge the UPSC Prelims answer key?

Ans: No, UPSC does not provide a facility to challenge the answer key for Prelims.

Ques: How to calculate expected scores using the UPSC prelims answer key?

Ans: Match your answers with the answer key, awarding +2 marks for each correct answer and deducting ⅓ mark (–0.66) for every incorrect response. CSAT is qualifying, so only accuracy matters there.

Ques: Can the preliminary answer key affect the final result declaration?

Ans: No. The final result is declared by UPSC after official evaluation. Answer keys are for candidates’ self-assessment and do not affect official results.

Ques: Where can I find detailed solutions along with UPSC CSE prelims answer key?

Ans: You can find detailed solutions along with UPSC CSE prelims answer key on Prepp.in.

Ques: What happens after clearing the UPSC CSE Prelims 2025? What is the next stage?

Ans: After clearing UPSC CSE Prelims 2025, candidates become eligible to appear for the UPSC Mains exam. The Mains consist of nine papers testing in-depth knowledge and writing skills. Successful candidates in Mains then proceed to the final stage—Personality Test (Interview).