UPPSC • Prelims • 2025 • GS Paper I
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Question 43
UPPSCScience & Technology2025GS-ISeries A
Subject / विषय: Science & Technology
Which gases are lighter than air?
1. Hydrogen chloride
2. Sulfur dioxide
3. Helium
कौन-सी गैसें वायु से हल्की हैं?
1. हाइड्रोजन क्लोराइड
2. सल्फर डाइऑक्साइड
3. हीलियम
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Author / EditorGoldej Kumar
Goldej Kumar is the Founder and Editor of Sri Ram Exams (Exam2.in), an independent educational platform for UPSC, State Public Service Commission, SSC and other competitive examinations. His editorial focus is on exam-relevant current affairs, source-based analysis, MCQ reasoning, previous-year-question patterns and clear bilingual learning for English- and Hindi-medium aspirants.