In the reactionH2S +NO2 →H20 +S +NO NO2 acts as:
Correct answer: A. Oxidizing agent
- A. Oxidizing agent
- B. Dehydrating agent
- C. Reducing agent
- D. A catalyst
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).
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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