Which of the following has the highest pH?: (A) Gastric juice, (B) Bile in the gallbladder, (C) Pancreatic juice, (D) Saliva
Answer is C. Gastric juice has lowest pH among the given options. Primary salivary secretion has a pH little below 7 {6.35-6.85}; after ductular modification, that is HCO3- is added, pH increases up to 8. Pancreatic juice has a pH of about 8-8.3. Gallbladder bile has a pH of about 6.