Which term is the point in titration where indicator changes colour?

• A. Endpoint
• B. Titrant
• C. Anode
• D. Electrolyte

Answer: (A)

The key idea is the point at which the indicator changes color during a titration. This observable moment is called the endpoint, the practical signal that the titration is complete. In a well-chosen indicator, the endpoint occurs very close to the equivalence point, where the amounts of solutions are stoichiometrically balanced. If the indicator is not perfect, the endpoint may shift a bit from the equivalence point, leading to a small error. The other terms don’t describe the color-change signal: the titrant is the solution you add; the anode is the electrode where oxidation occurs; and the electrolyte is the substance that carries current in the solution.