Chemistry · Electrochemistry
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In which of the following reaction hydrogen acts as oxidizing agent.
- A
H2 + Cl2 --> 2HCl
- B
C2H4 + H2 --> C2H6
- C
2Na + H2 --> 2NaH
- D
N2 + 3H2 --> 2NH3
In the correct reaction, 2Na + H2 --> 2NaH, sodium (Na) is oxidized, as it loses electrons to form Na+, while hydrogen (H2) is reduced to form H−. Therefore, in this reaction, H2 acts as an oxidizing agent by gaining electrons. In the other reactions, H2 is either oxidized or acts as a reducing agent.
In this reaction, H2 is oxidized to H+ and Cl2 is reduced to Cl−. Thus, H2 is not acting as the oxidizing agent; instead, it is being oxidized itself.
Here, the carbon in C2H4 is reduced, and H2 is oxidized. Therefore, H2 acts as a reducing agent, not an oxidizing one.
In this reaction, sodium (Na) is oxidized to Na+ while H2 is reduced to H−. Thus, H2 acts as the oxidizing agent by accepting electrons in this reaction.
In this reaction, N2 is reduced to NH3 and H2 acts as a reducing agent, not an oxidizing agent.
Tagged under Chemistry · Electrochemistry · 2016