What happens when a methyl orange solution is mixed with $HCl$?

20 ml of 0.5 N HCl and 35 ml of 0.1 N NaOH are mixed. The resulting solution will be

While digesting milk,it mixes with HCL acid, what happens at that moment when they get mixed or what will happen if we mix HCl with milk.

What happens when Barium Chloride solution is mixed with Ammonium Sulphate solution classify this reaction