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Graduate Chemistry Questions

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Graduate Acids and Bases
Graduate Acids and Bases
Select the most complete explanation of what the pH scale actually measures
  1. The acidity of a solvent
  2. The alkalinity of a solvent
  3. The concentration of hydrogen ions in a solution
  4. The concentration of hydroxide ions in a solute
Graduate Acids and Bases
The difference in pH units between two acidic solutions is three. How much more acidic is the stronger acid than the weaker acid?
  1. 3 times more acidic
  2. 30 times more acidic
  3. 100 times more acidic
  4. 1000 times more acidic
Graduate Macromolecules
What are the monomers of proteins?
  1. Hydrochloric acids
  2. Nucleic acids
  3. Carboxylic acids
  4. Amino acids
Graduate Properties of Matter
Water "beads up" on synthetic fabric like polyester but binds to cotton. What is the most likely explanation for this?
  1. Polyester is not a naturally occurring substance, whereas cotton is a naturally occurring substance.
  2. Polyester is more flexible than cotton.
  3. Polyester fibers are thinner than cotton fibers.
  4. Polyester is nonpolar, whereas cotton is polar.
Graduate Macromolecules
Graduate Biochemical Pathways
Which of the following best describes the chemical equation for photosynthesis?
  1. Carbon dioxide + Sugar + Energy = Oxygen + Water
  2. Oxygen + Water + Carbon dioxide = Sugar + Energy
  3. Water + Carbon dioxide + Energy = Sugar + Oxygen
  4. Oxygen + Sugar = Water + Carbon dioxide + Energy
Graduate Bonds and Mixing
A needle can be made to "float" on the surface tension of water. What causes this surface tension to form?
  1. The adhesion of water molecules to the needle
  2. The cohesion of water molecules to each other
  3. The solubility of water
  4. The heat capacity of water
Graduate Macromolecules
What is the chemical equation for glucose?
  1. C2H4O2
  2. C4H8O4
  3. C6H12O6
  4. C8H16O8
Graduate Kinetics and Equilibrium
Predict what would happen as the entropy of a system approached 100%.
  1. All motion would stop.
  2. Randomness would become maximized.
  3. Order would become maximized.
  4. Heat would decrease.
Graduate Biochemical Pathways
Which polysaccharide consists of individual long, twisted, unbranched chains of glucose?
  1. Starch
  2. Cellulose
  3. Glycogen
  4. This does not describe a polysaccharide.
Graduate Solvents, Solutes, and Solubility
Why is one side of a water molecule partially negative while the other side is partially positive?
  1. Uneven sharing of electron pairs occurs due to the strong pull of hydrogen.
  2. Uneven sharing of electron pairs occurs due to the strong pull of oxygen.
  3. Oxygen donates its electrons to hydrogen
  4. Hydrogen donates its electrons to oxygen.
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