set d Flashcards
All polysaccharides consist of sugar monomers joined together by
Glycosidic linkages
Which of the following values corresponds to the standard-state conditions (temperature, concentration, pressure) on electrode potentials?
- 298 K, 1 M, 760 torr
- 276 K, 0.1 M, 1 atm
- 25 C, 1 M, 760 torr
- 0 C, 1 M, 760 atm
- 298 K, 0.1 M, 1 atm
298 K, 1 M, 760 torr
A weak acid is 5% ionized at equilibrium. Therefore, we can say that the ionization reaction is _____ favored, because _____.
- product; the amount of products «_space;the amount of reactants
- reactant; the amount of products «_space;the amount of reactants
- product; the amount of products»_space; the amount of reactants
- reactant; the amount of products»_space; the amount of reactants
product; the amount of products «_space;the amount of reactants
Which of the following is not correct for a typical, battery-powered electrical circuit?
a. Cations are produced at the anode and the cations are reduced at the cathode
b. The anode is the negative terminal and the cathode is the positive terminal of the battery
c. The salt bridge equalizes gas pressure between the anode and cathode half-cells
d. Oxidation of the anode produces the electrons used in the circuit
e. Electrons move from the anode to the cathode via the external circuit
The salt bridge equalizes gas pressure between the anode and cathode half-cells
Do electrophilic compounds always react at the sulfur, no matter what?
- Yes, except when carbons are attached to the sulfur, then substitution occurs at the carbon
- Yes, except when oxygens are attached to the sulfur, then the oxygens react first.
- Yes, except when bromine is involved.
- Yes, even when oxygens are attached to the sulfur.
Yes, even when oxygens are attached to the sulfur
Long-chain hydrocarbons are converted into smaller-chain molecules by a process called
- Catalytic cracking
- Distillation
- Fractionation
- Converting
- Catalytic reforming
Catalytic cracking
Distillation separates components of a mixture due to difference in
- melting points
- boiling points
- solubility
- octane ratings
- viscosity
boiling points
A primary alcohol oxidizes in two stages to produce a(an) _____. This same product can also be obtained by oxidation of a(an) _____.
- carboxylic acid; aldehyde
- carboxylic acid; ketone
- aldehyde; secondary alcohol
- aldehyde; ketone
- tertiary alcohol; secondary alcohol
carboxylic acid; aldehyde
A gas cylinder and piston are covered with heavy insulation. The piston is pushed into the cylinder, compressing the gas. In this process, the gas temperature
- decreases
- increases then decreases
- stays the same
- decreases then increases
- increases
increases
What is/are the product/s of condensation polymerization of two amino acids?
- dipeptide
- dipeptide and water
- disaccharide
- water
dipeptide
Which of the following classes of organic compound is not a component of crude oil?
- alkenes
- alcohols
- aromatics
- alkanes
- cycloalkanes
alcohols
A species that changes the rate of a reaction but is neither consumed nor changed in that reaction is a/an
- Activated complex
- Reactant
- Intermediate
- Catalyst
Catalyst
The rate of the chemical reaction involving two substances, A and B, is measured. It is found that if the initial concentration of A used is doubled, keeping the B concentration the same, the rate doubles. If the concentrations of both A and B are doubled, the rate is eight times that measured in the first experiment. The rate law for this reaction is rate =
- k[A][B]^2
- 2k[A][B]
- k[A]^2[B]
- k[A][B]
k[A][B]^2
The linkage found in carbohydrates is chemically the same as a(an)
- Ester linkage
- Hydrogen bond
- Amide linkage
- Glycosidic bond
Glycosidic bond
Which of the following changes does NOT indicate an oxidation?
- Oxide ion becoming pure oxygen
- Reactant acting as a reducing agent
- Loss of electrons
- Decrease in oxidation number
Decrease in oxidation number
