Quiz: UPPSC Prelims 2019 (GS Paper I)
Category: UP PSC (PCS)
Question 48 of 149
UPPSC Prelims 2019 (GS Paper I)
32%
A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called:
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23 Aug 2025
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18 Oct 2025
This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2019 (GS Paper I)