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D1 > set e > Flashcards

set e Flashcards

1
Q

The principal component of natural gas is

  • Ethane
  • Butane
  • Propane
  • Methane
  • None of these choices
A

Methane

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2
Q

Which of the following base pairs is not possible?

  • Adenine – Thymine
  • Uracil – Adenine
  • Cytosine – Guanine
  • Guanine – Cytosine
  • Thymine – Uracil
A

Thymine – Uracil

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3
Q

Which of the following solids is commonly used as an inactive electrode in electrochemical cells?

  • Graphite
  • Zinc
  • Iron
  • Copper
A

Graphite

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4
Q

The polymer used to make food and drink coolers and building insulation material is

  • poly(vinyl acetate)
  • polytetrafluoroethylene
  • polystyrene
  • polypropylene
  • polyethylene
A

Polystyrene

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5
Q

Which element has the largest ionization energy?

  • Bromine
  • Chlorine
  • Fluorine
  • Iodine
A

Fluorine

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6
Q

The thermal behavior of any substance is characterized by what property?

  • Thermal index
  • Heat density
  • Heat constant
  • Thermal capacity
  • Specific heat
A

Specific heat

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7
Q

Most of the isotopes with atomic number greater than 83 undergo which type of decay?

  • Alpha emission
  • Positron emission
  • Electron emission
  • Beta emission
  • Gamma emission
A

Alpha emission

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8
Q

What is the stoichiometry of EDTA with metal ions?

  • 1:1, because EDTA forms a cage-like structure around the metal ion
  • 1:6, because EDTA is a hexaprotic weak acid with six distinct acid dissociation values
  • 1:2, because EDTA has two binding sites upon loss of the two ammonium protons
  • 1:4, because EDTA has four binding sites upon loss of the four carboxylic acid protons
A

1:1, because EDTA forms a cage-like structure around the metal ion

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9
Q

If polonium-210 emits an alpha particle, the other product will be

  • Radon-206
  • Mercury-204
  • Lead-206
  • Mercury-206
A

Lead-206

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10
Q

Which of the following accurately represents the molecular geometry for the carbon atoms in C2H6 (ethane), C2H4 (ethene), and C2H2 (ethyne)?

  • tetrahedral, linear, and planar, respectively
  • tetrahedral, planar, and linear, respectively
  • linear, linear, and planar, respectively
  • linear, tetrahedral, and planar, respectively
A

tetrahedral, planar, and linear, respectively

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11
Q

Which of the following compounds has been used as an octane enhancer?

  • Tertiary-butyl alcohol (2-methyl-2-propanol)
  • Ethanol
  • Tetraethyllead
  • Toluene (methylbenzene)
  • All of these choices
A

All of these choices

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12
Q

Compounds used as reference standards for octane ratings of 100 and 0, respectively, are

  • Gasoline and diesel fuel
  • Isooctane and octane
  • Octane and isooctane
  • 2,2,4-trimethylpentane and heptane
  • Isooctane and 2,2,4-trimethylpentane
A

2,2,4-trimethylpentane and heptane

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13
Q

In gas chromatography, volatile compounds in a mixture are separated by their

A

boiling points

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14
Q

A rate law relates which of the following?

  • reaction rate and concentration
  • temperature and concentration
  • reaction rate and temperature
  • energy and concentration
A

reaction rate and concentration

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15
Q

A polymer produced after converting compound (rubber) to an elastic and final end-use product is said to be

  • elastomeric
  • vulcanized
  • copolymerized
  • rubberized
A

vulcanized

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16
Q

The rating of the ability of a gasoline to burn smoothly in an internal combustion is its

  • Octane ration
  • Molar mass
  • Fuel density
  • Boiling point
  • Energy value
A

Octane rating

17
Q

Monomers used to produce addition polymers usually contain _____ in their molecular structure.

  • two or more different functional groups
  • benzene rings
  • branched carbon chains
  • double bonds
A

double bonds

18
Q

This term refers to a quantity of heat transferred at constant pressure

  • Work
  • Specific heat capacity
  • Thermal expansion coefficient
  • Enthalpy
  • Entropy
A

Enthalpy

19
Q

The study of the relationships between electron flow and redox reactions is called

  • Electrodynamics
  • Nuclear chemistry
  • Thermodynamics
  • Electrochemistry
  • Inorganic chemistry
A

Electrochemistry

20
Q

In a buffer solution, if [A−] = [HA], which of the following must be true?

  • pH < pKa
  • pH > 7.00
  • pH = pKa
  • pH < 7.00
  • pH > pKa
A

pH = pKa

21
Q

Because water can act as a Bronsted-Lowry acid or base, it is said to be _____.

  • amphiphilic
  • amphoteric
  • amphiprotic
  • amphiphobic
  • amphihydrous
A

amphiprotic

22
Q

An aqueous solution of potassium benzoate is predicted to be

  • strongly basic.
  • weakly acidic.
  • strongly acidic.
  • weakly basic.
  • neutral
A

weakly basic

23
Q

As the pH of a solution rises, [H3O+] _____, pOH _____, and [OH−] _____.

  • falls; rises; falls
  • rises; falls; rises
  • rises; falls; falls
  • falls, falls, falls
  • falls; falls; rises
A

falls; falls; rises

24
Q

In Bronsted-Lowry acid-base theory, an acid is defined as a substance which _____ and a base as one which _____.

  • donates a proton; accepts a proton
  • generates H3O+ ions in aqueous solution; generates OH− ions in aqeous solution
  • generates H3O+ ions in aqueous solution; donates a proton
  • generates OH− in aqeous solution; generates H3O+ ion in aqueous solution
  • accepts a proton; generates OH− ions in aqueous solution
A

donates a proton; accepts a proton

25
Q

A Bronsted-Lowry acid is always

  • a molecule or ion in which hydrogen is attached to an oxygen atom.
  • a highly dissociated acid.
  • a donor of one or more hydrogen ions.
  • both an acceptor and donor of hydrogen ions.
  • a weak acid.
A

a donor of one or more hydrogen ions.

26
Q

A buffer solution is one which

  • contains an equal number of hydronium and hydroxide ions.
  • contains more than the expected amount of solute for a particular temperature and is therefore unstable.
  • changes color upon addition of strong base.
  • contains the maximum amount of solute possible for a particular temperature.
  • resists changes in pH upon addition of acid or base.
A

resists changes in pH upon addition of acid or base.

D1 (7 decks)

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