Question

Which of the following is not an electrolyte?

1) HCl
2) Ca2CO₃
3) H₂O
4) NaOH

Answer 1

Based on the definition of an electrolyte, calcium carbonate (CaCO₃) is not an electrolyte.

Step-by-step explanation:

The electrolyte is a substance that conducts electricity when dissolved in water. Based on this definition, we can identify the nonelectrolyte from the given options.

1. HCl (hydrochloric acid) is an electrolyte because it dissociates into H+ and Cl- ions in water. It conducts electricity.
2. CaCO₃ (calcium carbonate) is not an electrolyte because it does not dissociate into ions in water. It does not conduct electricity.
3. H₂O (water) is not an electrolyte because it does not form ions when dissolved in water. It does not conduct electricity.
4. NaOH (sodium hydroxide) is an electrolyte because it dissociates into Na+ and OH- ions in water. It conducts electricity.

Therefore, the CaCO₃ is not an electrolyte from the given options.