QUESTION:
If you were to melt the ice on Pluto, what would be left?

ANSWER from Sanjay Limay on April 23, 1996:
The underlying solid planet of course.  Pluto is not a gaseous planet.

ANSWER from the Internet: at URL   http://www.seds.org/billa/tnp/pluto.html
Pluto's composition is unknown, but its density (about 2 gm/cm3) indicates
that it is probably a mixture of 80% rock and 10% water ice much like Triton.
The bright areas of the surface seem to be covered with ices of nitrogen with
smaller amounts of (solid) methane and carbon monoxide.  The composition of
the darker areas of Pluto's surface is unknown but may be due to primordial
organic material or photochemical reactions driven by cosmic rays.

Little is known about Pluto's atmosphere, but it probably consists primarily
of nitrogen with some carbon monoxide and methane.  It is extremely tenuous
with the surface pressure being only a few microbars.  Pluto's atmosphere 
may exist as a gas only when Pluto is near its perihelion, for the majority 
of Pluto's long year, the atmospheric gases are frozen into ice.