First slide

Amino acids

Question

Statement I ; Amino acids are soluble in water
Statement II ; Amino acids are cystalline solids

Moderate

A

Statements I and II are correct
B

Statement I is correct and statement II is incorrect
C

Statement I is incorrect and statement II is correct
D

Statements I and II are incorrect

Solution

Amino acids exist as Zwitter ions due to transfer of proton;
$H_{2} N - CH (R) - COOH ⇌ H_{3} \overset{+}{N} - CH (R) - {COO}^{-};$
Thus they are crystalline solids soluble in water;

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