Question

Write a chemical equation taking place when a glass rod is dipped in concentrated hydrochloric acid is introduced in the jar containing ammonia gas

Answer 1

no reaction will take place because we kept hcl in glass jar so how it happened

Answer 2

When a glass rod is dipped in concentrated hydrochloric acid is introduced in the jar containing ammonia gas white colored fumes are observed which is denser.

when a glass rod is dipped in concentrated hydrochloric acid ($HCl$) is introduced in the jar containing ammonia gas $N{ H }_{ 3 }$. A white coloured dense fumes are observed. This test  is mainly used for the detection of ammonia.

Let's write the chemical reaction between $HCl$ and $N{ H }_{ 3 }$ is as follows.

$HCl\quad +\quad N{ H }_{ 3 }(g)\quad \rightarrow \quad N{ H }_{ 4 }Cl\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad Ammonium\quad chloride$