What is occurring in the following reaction? h2 + cl2 → 2hcl a: cl2 is being oxidized. b: h2 is gaining two electrons. c: cl2 is acting as an oxidizing agent. d: h2 is being reduced.

Hydrogen reacts with Chlorine to produce Hydrochloric Acid,

                             H₂  +  Cl₂   →    2 HCl

Oxidation reaction:
                            The oxidation state of Hydrogen in H₂ is changing from 0 in H₂ to +1 in HCl per atom, means it has lost one electron per atom and two electrons per molecule, i.e.  Hence, Hydrogen is oxidized and has acted as reducing agent.

                            H₂    →  2 HCl  +  2 e⁻

Reduction reaction:
                            The oxidation state of Chlorine in Cl₂ is changing from 0 in Cl₂ to -1 in HCl per atom, means it has lost one electron per atom and two electrons per two atoms, i.e.  Hence, Chlorine is reduced and has acted as oxidizing agent.

                            Cl₂  +  2 e⁻    →  2 HCl 

Result:
          Option-C is the correct answer, Cl₂ is acting as an oxidizing agent.

Oxygen= 88ghydrogen= 12g