NextMockપરીક્ષાઓ શોધો, દા.ત. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2019

UPPCS · પ્રશ્ન 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
જવાબ બતાવો અને સમજૂતી

જવાબ: (A) Sublimation

સમજૂતી

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