UPSC • Prelims • 2025 • Prelims GS Paper I
Attempt the actual previous-year questions first. Official answer, analysis and elimination clue appear only after final submission.
Official Final Answer Key — Series A; 0 questions dropped; 100 questions scored 1 questions
Official Question Paper ↗ Official Answer Key ↗
Question 45
UPSCScience & Technology2025Prelims GS Paper ISeries A
Consider the following substances:
I. Ethanol
II. Nitroglycerine
III. Urea
Coal gasification technology can be used in the production of how many of them?
निम्नलिखित पदार्थों पर विचार कीजिए : I. एथेनॉल II. नाइट्रोग्लिसरीन III. यूरिया। कोयला गैसीकरण प्रौद्योगिकी का उपयोग इनमें से कितनों के उत्पादन में किया जा सकता है?
Official Final Answer Key — Series A; 0 questions dropped; 100 questions scored
Question 1 of 1
