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Karnataka PUC II Amines and Biomolecules — practice questions — page 6

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 151–180 of 201.

Pick the right answer, quicklyRead the answer and worked solution →Ammonolysis of alkyl halides is carried out in a sealed tube 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 →Insulin and albumin are examples of which class of protein?Read the answer and worked solution →Oxidation of glucose with nitric acid gives:Read the answer and worked solution →Enzymes speed a reaction by lowering its:Read the answer and worked solution →In the DNA double helix adenine pairs with:Read the answer and worked solution →Which set of vitamins is fat soluble?Read the answer and worked solution →A chain of more than ten amino acids is called a:Read the answer and worked solution →Carbohydrates are also known by which other name?Read the answer and worked solution →Polysaccharides are also called non-sugars because they are not:Read the answer and worked solution →Match each name to the reaction it labelsRead the answer and worked solution →The carbon whose hydroxyl decides alpha or beta glucose is called:Read the answer and worked solution →Amino acids the body cannot make and must eat are called:Read the answer and worked solution →The dipolar ion form of an amino acid is called a:Read the answer and worked solution →Which amino acid is not optically active?Read the answer and worked solution →Most naturally occurring amino acids carry which configuration?Read the answer and worked solution →The bond joining two amino acids in a protein is a:Read the answer and worked solution →Keratin and myosin are examples of which class of protein?Read the answer and worked solution →On denaturation a protein loses which structures?Read the answer and worked solution →Almost all enzymes are which kind of protein?Read the answer and worked solution →The sugar found in a DNA molecule is:Read the answer and worked solution →Which base occurs in RNA but not in DNA?Read the answer and worked solution →A base attached to a sugar without phosphate is called a:Read the answer and worked solution →Oligosaccharides give on hydrolysis how many monosaccharide units?Read the answer and worked solution →Sugars that reduce Tollens' reagent are called:Read the answer and worked solution →Glucose is an aldohexose also known as:Read the answer and worked solution →Prolonged heating of glucose with hydrogen iodide gives:Read the answer and worked solution →Glucose pentaacetate shows that glucose carries how many hydroxyls?Read the answer and worked solution →The water soluble component of starch is:Read the answer and worked solution →

Worked practice questions

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Questions
  1. Question
    Ammonolysis is run at:
    Choices
    1. 173 K
    2. 273 K
    3. 373 K
    Correct choice
    373 K
  2. Question
    Diazotisation is run at:
    Choices
    1. 273 to 278 K
    2. 373 to 378 K
    3. 473 to 478 K
    Correct choice
    273 to 278 K
  3. Question
    Aniline plus bromine water gives:
    Choices
    1. A white solid
    2. A blue gas
    3. A red oil
    Correct choice
    A white solid
  4. Question
    Better yield comes from:
    Choices
    1. Gatterman
    2. Sandmeyer
    3. Neither one
    Correct choice
    Sandmeyer
  5. Question
    Reactivity of halides runs:
    Choices
    1. RCl > RBr > RI
    2. RBr > RI > RCl
    3. RI > RBr > RCl
    Correct choice
    RI > RBr > RCl
Instructions
Tap the correct answer before the round moves on.
_Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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Ammonolysis of alkyl halides is carried out in a sealed tube at:

  1. 273 K
  2. 373 K
  3. 173 K
  4. 573 K
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Correct answer: B. 373 K

1. The halide is heated with ethanolic ammonia. 2. The tube must be sealed to hold the ammonia in. 3. The working temperature is 373 K. _Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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Replacing the diazo group by chlorine using a copper one salt is the:

  1. Sandmeyer reaction
  2. Sandwich reaction
  3. Saponify reaction
  4. Substrate reaction
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Correct answer: A. Sandmeyer reaction

1. The diazonium salt is treated with a cuprous halide. 2. Nitrogen escapes and the halide takes its place. 3. This is the Sandmeyer reaction. _Source: syllabus Chemistry Part 2, Unit 9 'Amines'_

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