Pharmacology True about pKa is: A pH at which ionized fraction of drug equals to unionized fraction B pH at which ionized fraction of drug is more than unionized fraction C pH at which ionized fraction of drug is less than unionized fraction D pH at which ionized fraction of drug is twice unionized fraction 💡 Explanation True about pKa is: ✓ Correct Answer: A. pH at which ionized fraction of drug equals to unionized fraction