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NEET UG Amines and Biomolecules — practice questions — page 2

Explore 207 free Amines and Biomolecules questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Amines and Biomolecules questions and exercises with answers

Showing questions 31–60 of 207.

Lower aliphatic amines are gases carrying a smell that is:Read the answer and worked solution →Lower aliphatic amines dissolve in water because they form:Read the answer and worked solution →Which class of amine has no intermolecular hydrogen bonding?Read the answer and worked solution →The order of boiling points of isomeric amines is:Read the answer and worked solution →The pKb value of ammonia is:Read the answer and worked solution →Aromatic amines are weaker bases than ammonia because the aryl group is:Read the answer and worked solution →Aniline is a resonance hybrid of how many structures?Read the answer and worked solution →Which reaction is used as a test for primary amines?Read the answer and worked solution →Hinsberg's reagent used to tell amines apart is:Read the answer and worked solution →Aniline with bromine water at room temperature gives:Read the answer and worked solution →The activating power of the amino group is curbed by:Read the answer and worked solution →Aniline heated with sulphuric acid finally yields:Read the answer and worked solution →Aniline fails to undergo the Friedel-Crafts reaction because it:Read the answer and worked solution →Benzenediazonium chloride is made from aniline and nitrous acid at:Read the answer and worked solution →Replacing the diazo group by chlorine using a copper one salt is the:Read the answer and worked solution →Introducing halogen using copper powder and a halogen acid is the:Read the answer and worked solution →Iodobenzene is obtained by treating the diazonium salt with:Read the answer and worked solution →Coupling of benzenediazonium chloride with phenol gives:Read the answer and worked solution →Match each name to the reaction it labelsRead the answer and worked solution →Order the steps to a coloured azo dyeRead the answer and worked solution →True or false about aminesRead the answer and worked solution →Sort each route by the amine it givesRead the answer and worked solution →Fill the gaps on amine chemistryRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Does it react with a primary amine only?Read the answer and worked solution →Pick the right answer, quicklyRead the answer and worked solution →Carbohydrates are defined as optically active polyhydroxy:Read the answer and worked solution →Carbohydrates are also known by which other name?Read the answer and worked solution →A carbohydrate that cannot be hydrolysed further is a:Read the answer and worked solution →Oligosaccharides give on hydrolysis how many monosaccharide units?Read the answer and worked solution →

Worked practice questions

Lower aliphatic amines are gases carrying a smell that is:

  1. Woody
  2. Minty
  3. Fishy
  4. Fruity
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Correct answer: C. Fishy

1. The first few members are gases at room temperature. 2. Their odour is very characteristic. 3. It is described as fishy. _Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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Lower aliphatic amines dissolve in water because they form:

  1. Hydrated anions
  2. Hydrogen halides
  3. Hydrolysed esters
  4. Hydrogen bonds
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Correct answer: D. Hydrogen bonds

1. The nitrogen lone pair meets the water molecule. 2. A bond forms between them. 3. That hydrogen bonding carries the amine into solution. _Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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Which class of amine has no intermolecular hydrogen bonding?

  1. Tertiary
  2. Secondary
  3. Primary
  4. Aromatic
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Correct answer: A. Tertiary

1. Hydrogen bonding needs a hydrogen on the nitrogen. 2. A tertiary amine has all three positions taken by groups. 3. So no such hydrogen is left. _Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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