JEE Mains · Chemistry · STD 12 - 10. Biomolecules
Consider the following sequence for aspartic acid The \(pI\) (isoelectric point) of aspartic acid
- A \(3.65\)
- B \(2.77\)
- C \(5.74\)
- D \(1.88\)
Answer & Solution
Correct Answer
(B) \(2.77\)
Step-by-step Solution
Detailed explanation
In the given reaction sequence \(pH\,=\,\frac{p{{K}_{1}}\,+\,p{{K}_{2}}}{2}\,=\,\frac{1.88\,+\,3.65}{2}\) \(=\frac{5.53}{2}\,=\,2.675\,\approx \,2.77\) At isoelectric point of aspartic acid both carboxylic as well as amino form co-exist.
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