Q6 / 90 · JEE Main 2018 (08 Apr) · Chemistry

The predominant form of histamine present in human blood is $({pK}_{a}, Histidine = 60)$

Correct answer
A
B
C
D

Solution

Structure of histamine

Blood is slightly basic in nature (

pH = 7.35

) approx. At this

pH

terminal

{NH}_{2}

will get protonated due to more basic nature.

∴

Predominant structure of histamine is

Hence, the correct answer is option: 'A'.

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