Final answer:
The compound that is NOT a covalent electrolyte is NaCl.
Step-by-step explanation:
To determine which compound is NOT a covalent electrolyte, we need to understand the properties of covalent and ionic compounds. Covalent compounds are formed by sharing electrons between atoms, and they do not dissociate into ions when dissolved in water. Ionic compounds, on the other hand, are formed by transferring electrons, and they dissociate into ions when dissolved in water, making them electrolytes.
Among the given compounds, HCl, HBr, and CH₃COOH are covalent compounds because they are formed by sharing electrons. NaCl, on the other hand, is an ionic compound because it is formed by transferring electrons and dissociates into Na+ and Cl- ions when dissolved in water, making it an electrolyte. Therefore, the answer is d) NaCl, which is the only compound that is not a covalent electrolyte.