There is no such thing. A solid and a gas are mutually exclusive properties. (In the same way, a car that has only one color of paint cannot be both red and blue.) If the question you mean to ask is what is an opaque gas (a gas you cannot see through well), gaseous iodine is good example.
Examples of a gas changing directly into a solid (deposition) - Water vapor in a cloud changing into solid snowflakes. Water vapor in the air turning directly to frost on any sub-freezing surfaces.
A solid reacting with a gas to form a new solid
Gas in atmosphere: argon Liquid in atmosphere: water (as rain) Solid in atmosphere: dust
because yes
An aloy is an example of a homogenous (metallic) solid mixture.
An example of a solid and gas solution: hydrogen dissolved in palladium.
Gas in atmosphere: argon Liquid in atmosphere: water (as rain) Solid in atmosphere: dust
Ice
A gas can't turn directly into a solid but a solid can turn into gas for example ice to water vapor.
Sawdust is a solid.
There are a number of examples of solid in gas solutions, such as smoke, in which carbon and air are in the form of a solution. Automobile exhaust is another example of solid in gas solution. An example of such solution is Iodine vapors in the air.
There are three classic states of matter: solid, liquid, and gas. An example of a liquid is lemonade, an example of a solid is a book, and an example of a gas is nitric oxide.
A solid in gas solution is a type of mixture where a solid substance is dispersed in a gas. An example is when a solid air freshener releases particles into the air. Similar to other types of solutions, the solid particles will eventually spread out evenly in the gas phase.
Examples of a gas changing directly into a solid (deposition) - Water vapor in a cloud changing into solid snowflakes. Water vapor in the air turning directly to frost on any sub-freezing surfaces.
Desublimation...For example -- frost.
Desublimation...For example -- frost.
Dry Ice