Question

Which of the following options is correctly matched?

• A. $\begin{array}{cc}\text{Water purification}& C{l}_2\\ \text{Obtained by electrolysis of water}& O_2\\ \text{Interacts with rhizobium bacteria}& N_2\\ \text{Used in fuel cells}& H_2\end{array}$
• B. $\begin{array}{cc}\text{Water purification}& C{l}_2\\ \text{Obtained by electrolysis of water}& N_2\\ \text{Interacts with rhizobium bacteria}& O_2\\ \text{Used in fuel cells}& H_2\end{array}$
• C. $\begin{array}{cc}\text{Water purification}& O_2\\ \text{Obtained by electrolysis of water}& H_2\\ \text{Interacts with rhizobium bacteria}& N_2\\ \text{Used in fuel cells}& C{l}_2\end{array}$
• D. $\begin{array}{cc}\text{Water purification}& N_2\\ \text{Obtained by electrolysis of water}& C{l}_2\\ \text{Interacts with rhizobium bacteria}& O_2\\ \text{Used in fuel cells}& H_2\end{array}$

Answer 1

The correct option is A

$\begin{array}{cc}\text{Water purification}& C{l}_2\\ \text{Obtained by electrolysis of water}& O_2\\ \text{Interacts with rhizobium bacteria}& N_2\\ \text{Used in fuel cells}& H_2\end{array}$

$C{l}_2$ is used for water purification and bleaching purposes.

$O_2$ can be obtained by the electrolysis of $H_{2}O$ where
$H_{2}O$ breaks down to give $H_2$ and $O_2$.

Rhizobium bacteria convert $N_2$ in the environment to ammonia $N{H}_3$ and other nitrogenous compounds.

$H_2$ and $O_2$ are both used in fuel cells. They react to create water and release energy in the process.