Question

When Chlorine $\left({\mathrm{Cl}}_2\right)$ gas combines with cold, dilute aqueous Sodium hydroxide $\mathrm{NaOH}$, the products are

• A. ${\mathrm{Cl}}^{-}\mathrm{and}{\mathrm{ClO}}^{-}$
• B. ${\mathrm{Cl}}^{-}\mathrm{and}{{\mathrm{ClO}}_2}^{-}$
• C. ${\mathrm{ClO}}^{-}\mathrm{and}{{\mathrm{ClO}}_3}^{-}$
• D. ${{\mathrm{ClO}}_2}^{-}\mathrm{and}{\mathrm{ClO}}_3$

Answer 1

The correct option is A

${\mathrm{Cl}}^{-}\mathrm{and}{\mathrm{ClO}}^{-}$

Explanation for the correct option:

A. ${\mathrm{Cl}}^{-}\mathrm{and}{\mathrm{ClO}}^{-}$

• At room temperature, chlorine is a yellow-green gas.
• Chlorine $\left({\mathrm{Cl}}_2\right)$ has a harsh, unpleasant stench that is discernible at low concentrations and is akin to bleach.
• The following reaction is given below:

$$\begin{gathered} {\mathrm{Cl}}_2\left(\mathrm{g}\right)+2\mathrm{NaOH}\left(\mathrm{aq}\right)\to \mathrm{NaCl}\left(\mathrm{s}\right)+\mathrm{NaOCl}\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right) \\ \mathrm{Chlorine}\mathrm{Sodium}\mathrm{Sodium}\mathrm{Sodium}\mathrm{water} \\ \mathrm{hydroxide}\mathrm{Chloride}\mathrm{Hypochlorite} \end{gathered}$$

Final Answer: Therefore, Option A ${\mathrm{Cl}}^{-}\mathrm{and}{\mathrm{ClO}}^{-}$ is the correct answer.