UPPSC • Prelims • 2025 • GS Paper I
Attempt the actual previous-year questions first. Official answer, analysis and elimination clue appear only after final submission.
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Question 16
UPPSCScience & Technology2025GS-ISeries A
Subject / विषय: Science & Technology
With reference to silver articles, consider the following statements:
1. Silver articles turn black after some time when exposed to air.
2. It happens due to coating of silver sulphide.
चाँदी की वस्तुओं के संदर्भ में निम्न कथनों पर विचार कीजिए:
1. वायु के संपर्क में कुछ समय बाद चाँदी की वस्तुएँ काली पड़ जाती हैं।
2. ऐसा सिल्वर सल्फाइड की परत बनने के कारण होता है।
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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.