Question

Example of a chemical changes of two gases combine to form white solid

Answer 1

vapours of hydrochloric acid and ammonia combine to form white solid

HCL + NH4 = NH4CL

hope it helps:)

Answer 2

Explanation:

When ammonia gas combines with HCl gas then it results in the formation of a solid ring of ammonium chloride. The reaction is as follows.

          $NH_{3}(g) + HCl(g) \rightarrow NH_{4}Cl(s)$

The formation of $NH_{4}Cl(s)$ is due to the electrostatic force of attraction between the $NH^{+}_{4}$ ion and $Cl^{-}$ ion.

This formation of ammonium chloride is a chemical change as the chemical composition of both $NH_{3}$ and HCl gas changes and results in the formation of $NH_{4}Cl$