Which of the following yeast is used for the production of riboflavin?
Which of the following yeast is used for the production of riboflavin?
Select an option to attempt
Correct Answer: Option D
Explanation
Acid strength and pKa:. A lower pKa = stronger acid (higher). Ranking from weakest (highest pKa) to strongest (lowest pKa): Acetic acid (, pKa = 4.75) → weakest. Trifluoroacetic acid (TFA,, pKa ≈ 0.0) → the three electron-withdrawing F atoms stabilise the conjugate base. Sulfuric acid (, pKa, but pKaas well for the first dissociation) → strong acid. Hydrochloric acid (HCl, pKa ≈ -7) → strongest. Order of INCREASING acid strength (decreasing pKa): Acetic acid < TFA << HCl. In terms of pKa values from high to low: Acetic acid > TFA >> HCl.