Which one of the following is termed as ‘Dry ice’ ?
Ice present in ice-cream
Solid water at Antarctica
Solid state of carbon dioxide
Solid water of ionosphere
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC NDA-2 – 2019
A) Ice present in ice-cream is frozen water.
B) Solid water at Antarctica is frozen water (H₂O ice).
C) Solid state of carbon dioxide is indeed dry ice.
D) Solid water of ionosphere is not a recognized term for dry ice; the ionosphere is a layer of the atmosphere where water exists primarily as gas or plasma, not solid ice.
– Dry ice sublimes (solid to gas transition) at atmospheric pressure.
– Common ice is frozen water (solid H₂O).