Final answer:
Ammonia gas diffuses faster than acid gas. Under high temperature, both gases diffuse at a faster rate.
Step-by-step explanation:
The white deposit that forms on the wall of the glass tube is ammonium chloride (NH4Cl). This is because when ammonia gas (NH3) and acid gas (HCl) diffuse and react, they form ammonium chloride. Therefore, ammonia gas diffuses faster than acid gas.
When the experiment is performed under high temperature, the rate of diffusion of both ammonia gas and acid gas increases. This is because at higher temperatures, gas molecules have more kinetic energy and move faster, leading to faster diffusion.