Q97 · CSIR NET Chemistry, June 2012
Paper: CSIR NET June 2012 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Thermodynamics – General · Marks: 2 · Difficulty: Medium
The vapour of a pure substance, when cooled under a pressure less than its triple-point pressure,
(a)Liquefies
(b)Liquefies first and then solidifies
(c)Solidifies directly
(d)Remains unchanged
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Below the triple-point pressure the liquid is not stable, so vapour deposits directly to solid (c).
Study loop for Thermodynamics