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JEE Main 201912 JanuaryEvening Shift
Exam
JEE Main
Year
2019
Date
12 January
Shift
Evening Shift
Subject
Chemistry
Chapter
Biomolecules

JEE Main 2019 · 12 January · Evening Shift · Chemistry · Biomolecules

The correct structure of histidine in a strongly acidic solution...

The correct structure of histidine in a strongly acidic solution (pH=2)\left(pH = 2\right) isThe correct structure of histidine in a strongly acidic solution (pH = 2) isThe correct structure of histidine in a strongly acidic solution (pH = 2) isThe correct structure of histidine in a strongly acidic solution (pH = 2) isThe correct structure of histidine in a strongly acidic solution (pH = 2) isThe correct structure of histidine in a strongly acidic solution (pH = 2) is

Options

  1. AAn engine develops a constant power of 40 kW . The total work done by the engine in 5 minutes is
  2. BAn engine develops a constant power of 40 kW . The total work done by the engine in 5 minutes is
  3. CAn engine develops a constant power of 40 kW . The total work done by the engine in 5 minutes is
  4. DAn engine develops a constant power of 40 kW . The total work done by the engine in 5 minutes is

Correct answer

D. An engine develops a constant power of 40 kW . The total work done by the engine in 5 minutes is

Step-by-step solution

The correct structure of histidine in a strongly acidic solution (pH = 2) is

In the acidic medium, only basic nitrogen is protonated. The second nitrogen is less basic because the lone pair is involved in aromaticity, while 11 and 33 are more basic.

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