[Naples]

Specify if the following are oxidation-reduction reactions and identify the oxidizing agent, reducing agent, substance being oxidized and substance being reduced.

a. HCl(g) + NH₃(g) => NH₄Cl(s)
I think it's an ox-red reaction and the reducing agent/substance oxidized is N but I'm not sure and I don't know the oxidizing agent/substance reduced.

c. SiCl₄(l) + 2H₂O(l) => 4HCl(aq) + SiO₂(s)
From what I can tell it's not an ox-red reaction because nothing is getting reduced or oxidized but I'm not sure...

Any help is greatly appreciated! 

[AWK]

a - not true
Have you ever heard about neutralization reactions?