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Standard XII
Chemistry
Question

An amino acid reacts with 10 ml 0.05M NaOH and the final solution has pH=2.30. When 20 ml of the same base is added to the resulting solution, the pH becomes 9.7. Identify the amino acid and calculate the isoelectric point of the amino acid. This amino acid is prepared by the reaction of compound (X) with NH3, and further hydrolysis with HCN. Compound (X) is less C atom-containing compound that gives positive iodoform test and positive Fehling's solution test. The molecular weight of compound (X) is:
  1. 36
  2. 40
  3. 42
  4. 44

A
44
B
40
C
36
D
42
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Solution
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Compound(X) will go through these reactions.
Molecular Weight of this is 12(C)×2+16(O)+4(H)=44 gm

986414_256584_ans_0fd3c82eb3ed4d9d89c334ed26b4d68d.png

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