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UPPSC PCS 2019 · Question 43 of 150

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

Science & Tech

  1. ASublimationCorrect
  2. BEvaporation
  3. CDiffusion
  4. DRadiation

Answer: A. Sublimation

Explanation

Sublimation is the direct conversion of a solid into gas without passing through the liquid state.

Source: https://theexampillar.com/uppsc-pcs-acf-and-rfo-pre-exam-paper-2019-paper-1-in-english-answer-key/

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