Which of the following is an example of a decomposition reaction that occurs due to the application of electric current?

Correct option is D

​Correct Answer: (D) Electrolysis of water

Explanation:

The electrolysis of water is an example of a decomposition reaction that occurs due to the application of electric current. In this process, water (H₂O) is broken down into hydrogen gas (H₂) and oxygen gas (O₂) by passing an electric current through it. The reaction is:

​$$2H_2O(l)→electricity2H_2(g)+O_2(g)$$​​

Additional Informatios:

• Heating calcium carbonate: This is a thermal decomposition reaction, not caused by electric current.
• Decomposition of potassium permanganate by heat: This is also a thermal decomposition reaction, where heat is used to break down potassium permanganate into potassium manganate, oxygen, and manganese dioxide.
• Decomposition of sodium bicarbonate by heat: This is another thermal decomposition reaction, where heating sodium bicarbonate (baking soda) produces sodium carbonate, water, and carbon dioxide.

Thus, electrolysis of water is the correct example of decomposition caused by the application of electric current.