Why does the mixture of gases NH3 HCl not obey dalton's law of partial pressure - Chemistry - States of Matter

Question

Why does the mixture of gases NH3 HCl not obey dalton's law of
partial pressure

Priyanka Madhu · Accepted Answer

This is because when you mix HCl and NH3, they react to
form NH4Cl which is solid As it reacts and form solid
product it does not obey law of partial pressure

NH3 + HCl → NH4Cl