Question

$2\mathrm{NaCl}\to 2\mathrm{Na}+{\mathrm{Cl}}_2$

The above reaction can be successfully done using:

• A. Thermal decomposition
• B. Photolytic decomposition
• C. Electrolytic decomposition
• D. Enzymatic decomposition

Answer 1

The correct option is C

Electrolytic decomposition

An explanation for the correct option:

1. Electrolytic decomposition: A reaction in which a chemical substance is decomposed into two or more substances by the application of electricity.
2. The reaction $2\mathrm{NaCl}\to 2\mathrm{Na}+{\mathrm{Cl}}_2$can be successfully done using Electrolytic decomposition.
3. In the reaction, $$\begin{gathered} 2\mathrm{NaCl}\left(\mathrm{l}\right)\stackrel{\mathrm{electricity}}{\to }2\mathrm{Na}\left(\mathrm{s}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right) \\ (\mathrm{Molten}\mathrm{Sodium}\mathrm{chloride})(\mathrm{Molten}\mathrm{Sodium})(\mathrm{Chlorine}\mathrm{gas}) \end{gathered}$$the molten Sodium chloride will decompose into Sodium and Chlorine gas, when electricity is passed through it.

An explanation for the incorrect options:

1. Thermal decomposition: A chemical reaction in which a substance breaks down to form two or more new substances by the application of heat is called thermal decomposition. The given reaction is an electrolytic decomposition. Hence option (A) is incorrect.
2. Photolytic decomposition: A chemical reaction in which a substance decomposes into two or more new substances, by the application of light is termed as photolytic decomposition. Hence option (B) is incorrect.
3. Electrolytic decomposition: the process of converting food into energy is known as enzyme breakdown. Our saliva, pancreas, stomach, and intestine contain enzymes that break down lipids, proteins, and carbohydrates in our bodies to produce energy, which is then used for cell development and repair. So option (D) is incorrect.

Therefore, the reaction $2\mathrm{NaCl}\to 2\mathrm{Na}+{\mathrm{Cl}}_2$ can be successfully done using Electrolytic decomposition. Hence, option (c) is correct.