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MCQs

Total Questions : 108 | Page 10 of 11 pages
Question 91. A compound that is capable of forming hydrogen bonds with water
  1.    is probably held together by noncovalent bonds
  2.    contains at least some polar covalent bonds
  3.    should act as a good buffer for acids and bases
  4.    does not dissolve well in water
 Discuss Question
Answer: Option B. -> contains at least some polar covalent bonds
Question 92. A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?
  1.    Phospholipid
  2.    Protein
  3.    Strong base
  4.    DNA
 Discuss Question
Answer: Option B. -> Protein
Question 93. H2O and CH4 are both examples of
  1.    acids
  2.    molecules
  3.    none of these
  4.    ions
 Discuss Question
Answer: Option B. -> molecules
Question 94. Who discovered and described the blood groups (ABO) classification?
  1.    Karl Hooper
  2.    Otto Warburg
  3.    Karl Landsteiner
  4.    Theodor Kocher
 Discuss Question
Answer: Option C. -> Karl Landsteiner
Question 95. Hydrogen bonds and hydrophilic interactions are types of
  1.    weak chemical bonds that hold together the atoms within a molecule
  2.    strong chemical bonds that hold together the atoms within a molecule
  3.    weak chemical bonds that link together separate molecules
  4.    strong chemical bonds that link together separate molecules
 Discuss Question
Answer: Option C. -> weak chemical bonds that link together separate molecules
Question 96. The effectiveness or capacity of a buffer solution can be affected by
  1.    concentration of the conjugate base to the weak acid
  2.    both (a) and (b)
  3.    molar concentration of the buffer components
  4.    temperature of buffer components
 Discuss Question
Answer: Option B. -> both (a) and (b)
Question 97. Which of the following statements about covalently bonded molecules is false?
  1.    Electrons are shared between the atoms that make up the molecule
  2.    Such molecules often result from the interaction of ionized atoms
  3.    The chemical bonds that hold the molecule together are relatively strong
  4.    Noncovalent bonds may also be present, especially if the molecule is large
 Discuss Question
Answer: Option B. -> Such molecules often result from the interaction of ionized atoms
Question 98. A solution with pH = 5 is __________ than a solution with pH = 7.
  1.    10 times more acidic
  2.    2 times more basic
  3.    100 times more acidic
  4.    10 times more basic
 Discuss Question
Answer: Option C. -> 100 times more acidic
Question 99. The lone pair electrons on oxygen in a H20 molecule
  1.    carry a partial negative charge
  2.    carry a partial positive charge
  3.    form covalent bonds in ice
  4.    are not important for the properties of water
 Discuss Question
Answer: Option A. -> carry a partial negative charge
Question 100. Which of the following statements about water is correct?
  1.    All of these
  2.    Polar substances that can form hydrogen bonds will dissolve in it
  3.    Nonpolar substances like oils are not soluble in it
  4.    It is critical for many of the chemical processes found in living systems
 Discuss Question
Answer: Option A. -> All of these

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