Question

In the reaction,
$H_{2}O\text{(steam)}+C\to CO+H_2$.
Which of the following is true?

• A. $H_{2}O$ is the reducing agent.
• B. $H_{2}O$ is the oxidising agent.
• C. Carbon is the oxidising agent.
• D. It is not a Redox reaction.

Answer 1

The correct option is B $H_{2}O$ is the oxidising agent.

The reaction:
$H_{2}O\text{(steam)}+C\to CO+H_2$.
Oxidation states,
$+1\text{for}H0\text{for}C+2\text{for}C0\text{for}H$

Oxidation state of $C$ is increasing so it is being oxidised by $H_{2}O$ so, $H_{2}O$ is oxidant.

Oxidation state of $H$ is decreasing so it is being reduced by $C$. So, $C$ is reductant.