In the reactionH2S +NO2 →H20 +S +NO NO2 acts as:

Explanation

In a redox reaction, an oxidizing agent is a substance that gains electrons and is reduced. Conversely, a reducing agent is a substance that loses electrons and is oxidized.Let's analyze the oxidation states of the elements involved in the reaction:H₂S: S goes from -2 (in H₂S) to 0 (in S). This indicates oxidation of sulfur.NO₂: N goes from +4 (in NO₂) to +4 (in NO₂). There is no change in the oxidation state of nitrogen.Since sulfur loses electrons (gets oxidized), the reactant that caused this change, NO₂, must be the oxidizing agent. It gains electrons (gets reduced).