**(A):** In the titration of with , phenolphthalein is not suitable for the second end point.
**(R):** Phenolphthalein is a basic indicator.

Question

**(A):** In the titration of $Na_2CO_3$ with $HCl$, phenolphthalein is not suitable for the second end point.
**(R):** Phenolphthalein is a basic indicator.

Prashant Kotian · Accepted Answer

Correct answer: C. **Assertion:** The second end point occurs at pH ~3.7, whereas phenolphthalein's working range is pH 8.3–10.0. Statement is true.
**Reason:** Phenolphthalein is chemically a weak organic acid (), not a base. Statement is false.

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