NextMockపరీక్షలు వెతకండి, ఉదా. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2019

UPPCS · ప్రశ్న 124

A sample of substances like camphor, naphthalene or dry ice disappears after some time when exposed to air. This phenomenon is called

  1. Sublimation
  2. Evaporation
  3. Diffusion
  4. Radiation
సమాధానం చూపించు & వివరణ

సమాధానం: (A) Sublimation

వివరణ

Sublimation is the direct change from solid to vapour without melting, as seen in camphor, naphthalene and dry ice (solid CO2).