a reducing agent
a nitrating agent
an oxidizing agent
a catalytic agent
a neutralizing agent
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Discussions (1)
In the given reaction, nitric acid (HNO3) is acting as an **oxidizing agent**. This is because it is causing the carbon (C) to lose electrons and be converted into carbon dioxide (CO2). An oxidizing agent is a substance that has the ability to oxidize other substances — in other words, it accepts electrons from that substance. So, the correct answer is **C**.
It's not acting as a reducing agent (which would gain electrons and reduce other substances), a nitrating agent (which would introduce a nitro group into a molecule), a catalytic agent (which would speed up a reaction without being consumed), or a neutralizing agent (which would cancel out the effect of another agent). Therefore, options A, B, D, and E are incorrect in this context.
