Quiz 10 Flashcards
- Which of the following is NOT true of liquids?
they have no definite shape or volume
they have a definite shape
they have a boiling point
they have a definite shape
- The composition of a mixture
may vary
remains constant
has a definite ratio throughout
is easily calculated
may vary
- The intrinsic energy in the particles of any pure substance is highest in the
solid phase
liquid phase
gaseous phase
gel phase
gaseous phase
- Which of the following is not a pure substance?
water
hydrogen
milk
oxygen
milk
- A(n) ______ is always composed of the same elements combined in a definite proportion by mass.
isotope
compound
ion
allotrope
compound
- Which of the following is true of our understanding of the nature of the atom?
It has undergone little, but significant change and is now complete
It has undergone change and will likely continue to do so
It is just as the ancients originally described it
It has undergone such major changes it is returning to the ancient model
It has undergone change and will likely continue to do so
- An example of a chemical change is
freezing a water
breaking a glass
sublimation of carbon dioxide
digestion of food
digestion of food
- The bond formed by the sideways overlap of p-orbitals is
ionic
sigma
pi
coordinate
pi
- Equal sharing of a pair of electrons between two atoms results in the formation of
nonpolar bond
polar bond
ionic bond
coordinate bond
nonpolar bond
- To balance chemical equations, one has to change the
formulas
subscripts
coefficients
charge
coefficients
- The ionization energies of metals from top to bottom of a family or group
increase
decrease
does not change
remain the same
remain the same
- The bond which involves the complete transfer of electrons
polar bond
nonpolar bond
ionic bond
coordinate bond
ionic bond
- The charge of the nucleus is due to the
ions
protons
electrons
neutrons
electrons
- Air is
an element
a compound
a homogeneous mixture
a heterogeneous mixture
a heterogeneous mixture
- The scientist who formulated the earliest atomic theory is
Charles Mortimer
James Chadwick
Ernest Rutherford
John Dalton
John Dalton
- Which group of metals is most reactive?
IA
IIA
IIIA
IVA
IA
- Who suggested that an atom has a nucleus or center in which the positive charge and mass are concentrated?
Thompson
Goldstein
Rutherford
Milleken
Rutherford
- The symbol of an element represents
a molecule
a radical
an atom
an ion
an atom
- As the number of neutrons in an atom of a given element increases, its atomic number
increases
decreases
varies
remains constant
increases
- The father of modern chemistry is
John Dalton
Antoine Lavoisier
Robert Boyle
Joseph Priestly
Antoine Lavoisier
- Which accounts for the alkalinity of bases in water?
oxide ions
hydronium ions
ammonium ions
hydroxide ions
hydronium ions
- Iodine, when heated, passes from the solid phase directly to the gaseous phase. This is an example of
Charle”s law
sublimation
vapor pressure
heat of fusion
sublimation
- When hydrogen ions unite with hydroxide ions to form water, the process is known as
titration
hydrolysis
neutralization
decomposition
hydrolysis
- Solutions of both acids and bases are alike in that they both
taste sour
are electrolytes
accept a proton
accept an electron
are electrolytes
- The substance that is oxidized in a redox reaction is
oxidizing agent
oxidizer
reducing agent
gainer of electrons
reducing agent
- Aluminum hydroxide is an amphoteric compound. This means that aluminum hydroxide
is highly colored
is used as a reducing agent
insoluble in strong base
can act as weak acid or weak base
can act as weak acid or weak base
- Acetic acid is classified as weak acid because it
does not ionize in water
does not neutralize bases
slightly ionize in water
react rapidly with zinc to produce hydrogen
slightly ionize in water
- According to Bronsted Lowry theory, an acid is any substance that
donates a proton
donates an electron pair
donates an electron
accepts an electron pair
donates a proton
- The hydronium ion is a complex ion composed of
an electron
a neutron
a proton
a positron
a proton
- The exact amount of solute dissolve in a given amount of solvent is
concentration
unsaturated
dilution of solution
solubility of solute
solubility of solute
- The chaotic zigzag motion of particle in solution is describe by
electrical charge effect
Tyndall effect
Brownian movement
Osmosis
Brownian movement
- The temperature at which the vapor pressure is equal to the prevailing atmospheric pressure is
boiling point
melting point
freezing point
critical point
boiling point
- The indicator which turns yellow in basic solution is
phenolphthalein
blue litmus
methyl orange
red litmus
methyl orange
- A base is an electron pair donor as defined by
Arrhenius
Lewis
Democritus
Bronsted Lowry
Lewis
- An acid is classified as strong
only in concentrated solutions
if it turns blue litmus red
if it forms salt with NaOH
if it ionizes almost completely in solution
if it ionizes almost completely in solution
- Which of these is always formed when an acid neutralizes with base?
a precipitate
water
a soluble salt
an insoluble salt
water
- In a reaction mechanism, the rate determining step is
slow step
second step
first step
fast step
slow step
- When a substance gains electrons it
is oxidized
increase in oxidation number
is reduced
lose protons
is reduced
- Which term is applied to an aqueous solution whose hydrogen ion concentration is less than the hydroxide ion concentration?
basic
neutral
acidic
unsaturated
basic
- A chemical compound is always composed of the same kind of atoms in the same proportion. This is an expression of the
law of chemical change
law of multiple proportions
law of definite proportions
law of conservation of mass
law of definite proportions
- Elements are composed of extremely small particles called atoms. All atoms of the same element are alike, and atoms of different elements are different. This is an expression of the
quantum theory
kinetic theory
dalton’s theory
Bohr theory
dalton’s theory
- The magnetic quantum number is related to the
direction of turning
orientation in space
shape of the electron cloud
distance from the nucleus
orientation in space
- The maximum number of electrons that can stay in a d-orbital is
10
8
6
2
2
- Deuterium or heavy hydrogen has an atomic number of 1 and a mass of
3
2
1
4
2
- Neon belong to a type of element called
representative
transition
inner transition
noble gases
noble gases
- Which of the following is a physical change?
decomposition
sublimation
fermentation
oxidation
sublimation
- The chemistry of compounds of carbon is called
inorganic chemistry
biochemistry
physical chemistry
organic chemistry
organic chemistry
- A measure of the amount of matter in a sample is the
specific gravity
density
mass
weight
mass
- The kind of bond formed between hydrogen and fluorine is
coordinate covalent
nonpolar covalent
polar covalent
ionic
polar covalent
- One of the following molecules do not follow the octet rule. This molecule is
PCl3
SbCl3
BF3
NH3
BF3
