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Karnataka PUC II Amines and Biomolecules — practice questions — page 5

Explore 201 free Amines and Biomolecules questions in Karnataka PUC II 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 121–150 of 201.

Lactose, the sugar of milk, is built from glucose and:Read the answer and worked solution →The word protein comes from a Greek word meaning:Read the answer and worked solution →The amine from Hoffmann degradation has how many carbons?Read the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Sort each route by the amine it givesRead the answer and worked solution →True or false about aminesRead 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 →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 →Benzenediazonium chloride is made from aniline and nitrous acid at: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 →Nitriles reduced with lithium aluminium hydride give:Read the answer and worked solution →Lower aliphatic amines are gases carrying a smell that is:Read the answer and worked solution →Aniline is a resonance hybrid of how many structures?Read the answer and worked solution →Amines are best regarded as derivatives of:Read the answer and worked solution →The geometry around nitrogen in an amine molecule is:Read the answer and worked solution →The C to N to E angle in an amine is less than:Read the answer and worked solution →In the IUPAC system primary amines are named as:Read the answer and worked solution →Nitro compounds are reduced to amines by hydrogen over:Read the answer and worked solution →Reduction of nitro compounds with iron scrap uses which acid?Read the answer and worked solution →Reduction of a nitrile gives an amine with how many more carbons?Read the answer and worked solution →Does it react with a primary amine only?Read the answer and worked solution →Fill the gaps on amine chemistryRead the answer and worked solution →

Worked practice questions

Lactose, the sugar of milk, is built from glucose and:

  1. Glycerate
  2. Glutamate
  3. Galactose
  4. Gluconate
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Correct answer: C. Galactose

1. Lactose is a disaccharide found in milk. 2. One of its two units is glucose. 3. The other unit is galactose. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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The word protein comes from a Greek word meaning:

  1. Of prime importance
  2. Of steady structure
  3. Of soluble material
  4. Of similar molecules
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Correct answer: A. Of prime importance

1. The Greek root of the word is proteios. 2. It was chosen to mark how central these molecules are. 3. It means primary or of prime importance. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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The amine from Hoffmann degradation has how many carbons?

  1. Two more
  2. One less
  3. One more
  4. Two less
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Correct answer: B. One less

1. An alkyl group migrates from the carbonyl carbon to nitrogen. 2. That carbonyl carbon leaves the molecule. 3. So the amine is one carbon shorter than the amide. _Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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