This series of reactions shows the transformation of chlorine gas (Cl2) into silver chloride (AgCl):

Cl2 (chlorine gas) reacts with hydrogen gas (H2) to form hydrogen chloride gas (HCl):
Cl2 + H2 → 2HCl

Hydrogen chloride gas (HCl) reacts with zinc metal (Zn) to form zinc chloride (ZnCl2) and hydrogen gas (H2):
2HCl + Zn → ZnCl2 + H2

Zinc chloride (ZnCl2) then reacts with silver nitrate (AgNO3) to form silver chloride (AgCl) and zinc nitrate (Zn(NO3)2):
ZnCl2 + 2AgNO3 → 2AgCl + Zn(NO3)2

So, the overall reaction can be summarized as:
Cl2 + H2 + Zn + 2AgNO3 → 2AgCl + Zn(NO3)2 + 2H2