42nd B.P.S.C. (Pre) 1997-98

Dry ice is –

aSolid water
bMountain ice
cSolid CO2✓ Correct
dSolid carbon monooxide

Explanation

Solid carbon dioxide looks like ice; therefore, it is called dry ice. Dry ice sublimates directly into carbon dioxide gas without changing into the liquid state.

general-science