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  •  In which reaction hydrogen is acting as an oxidant?  <div clas

 In which reaction hydrogen is acting as an oxidant?

 

Option: 1

Reaction of hydrogen with fluorine.


Option: 2

Reaction of hydrogen with sodium.


Option: 3

Reaction of hydrogen with lithium.


Option: 4

Both b and c


Answers (1)

best_answer

When hydrogen acts as oxidizing agent, it itself gets reduced. The hydrogen atom accepts an electron to form hydride ion. Thus, it reacts with lithium to form lithium hydride. (Lithium gets easily oxidised as it highly electropositive). Hence, lithium is oxidized and therefore, hydrogen acts as an oxidizing agent.

\underset{\textup{OS = 0}}{ 2\mathrm{Na}}+\mathrm{H}_2 \rightarrow \underset{\textup{OS = +1}}{2 \mathrm{NaH}}

here, it oxidizes Na so it acts as an oxidising agent.

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Anam Khan

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