Which of the following substances decomposes when an electric current is passed through it?
- Glucose solution
- Zinc rod
-
Hydrochloric acid
- Tetrachloromethane
The correct answer is: C
Explanation
Glucose does not decompose when an electric current passes through it because it is a non-electrolyte and does not conduct electricity. However, hydrochloric acid (HCl) does decompose when an electric current passes through it because it is a strong electrolyte.