Are clouds a gas, liquid, and/or solid?
The cloud that you see is a mixture of solids and liquids.  The liquid is water and the solids are ice, cloud condensation nuclei and ice condensation nuclei (tiny particulates that water and ice condense on).  The invisible part of clouds that you cannot see is water vapor and dry air.  The majority of the cloud is just plain air in which the invisible water vapor is mixed with and the very tiny water drops and ice particles are suspended in.

A cloud is a mixture of gas, liquid and solids.