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Q.

P^Ka of –COOH group in tryptophan is 2.4 when tryptophane is placed in solution of pH 5.9, doesn’t migrate towards any pole during electrolysis. Then what us the P^ka of NH₃ group in tryptophane

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a

2.4

b

3.5

c

9.4

d

5.9

answer is C.

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Detailed Solution

$pI = pH = \frac{{pK}_{a_{1}} + {pK}_{a_{2}}}{2}$

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