No, hydrogen gas is a pure substance.
Hydrogen gas is always given off when an acid solution is electrolyzed.
An example of a solid and gas solution: hydrogen dissolved in palladium.
It is possible for a gas to dissolve into a solid, in which case you could say that the mixture of solid and gas is a type of solution. An example is hydrogen dissolving in platinum.
Hydrogen gas is produced when a metal reacts with a dilute acid. This reaction occurs when the metal displaces hydrogen from the acid, forming metal salts and releasing hydrogen gas as a byproduct.
Hydrogen and YOU !
The products of electrolyzing brine solution (sodium chloride in water) are chlorine gas, hydrogen gas, and sodium hydroxide. Chlorine gas is produced at the anode, hydrogen gas at the cathode, and sodium hydroxide accumulates in the solution.
A common example of a solid solution would be salt water. The salt (usually sodium chloride) is the solute and the water is the solvent. A common example of gas solution would be soda water (Seltzer or club soda). Soda water is a solution in which the gas, carbon dioxide, is the solute and water is the solvent.
A solution that is composed completely of gas is carbon dioxide. Hydrogen dioxide is also a solution composed completely of gas.
HBr In a chemical equation you would write it as HBr(aq).
An example of a solid and gas solution: hydrogen dissolved in palladium.
The magnesium will produce bubbles of hydrogen gas in the acid solution. It may do this in the salt solution, but not as much.
When calcium reacts with hydrochloric acid, calcium chloride and hydrogen gas are formed. The calcium displaces hydrogen in the acid to form calcium chloride, which is a salt, and hydrogen gas is released as a byproduct of the reaction.