Quiz 27 Flashcards
- The energy needed to remove an electron from a neutral atom is
electron affinity
electronegativity
first ionization energy
ductility
first ionization energy
- Two electrons in the same atom that have identical values of the quantum numbers n,l and ml are said to be in:
the same shell & subshell but different orbital
the same shell, subshell, & orbital
the same shell, but different subshells and orbitals
different shells, subshells and orbitals
the same shell, subshell, & orbital
- Two major types of chemical bonds are observed in chemical bonding: ionic and covalent. Which of the following has a bond that is the least ionic in character?
NaCl
CH4
H2
H2O
H2
- Vodka that is 90 proof contains what percent alcohol?
9
45
90
180
45
- All halogens have similar reactivity because
they have the same number of protons
they have the same number of electrons
they have similar outer shell electron configurations
they have valence electrons with the same quantum numbers
they have similar outer shell electron configurations
- What type of bonds are found in solid NaCl?
van der waals
ionic
covalent
hydrogen
ionic
- An apparatus used to measure the heat absorbed or released by a reaction.
centrifuge
barometer
balance
calorimeter
calorimeter
- An apparatus used to measure atmospheric pressure.
centrifuge
barometer
balance
calorimeter
barometer
- An apparatus used to measure weight.
centrifuge
barometer
balance
calorimeter
balance
- An apparatus used to sediment particles in suspension.
centrifuge
barometer
balance
calorimeter
centrifuge
- The most abundant organic substance found in nature is
starch
glycogen
cellulose
dextran
cellulose
- Sugars in which the aldehyde group can be oxidized to a carboxylic acid group are called
glycosides
glucosides
reducing sugars
phosphate esters
reducing sugars
- In a solution, the solvent is
the substance being dissolved
the major component
always liquid
usually a salt
the major component
- When NaCl dissolves in water, the sodium ions are
attracted to the oxygen ends of water molecules
attracted to the hydrogen ends of water molecules
too attracted to the chloride ions to dissolve completely
bonded covalently to the water molecules
attracted to the oxygen ends of water molecules
- To increase the solubility of sugar in water, you must
stir the solution vigorously
pulverize the sugar particles before adding them to the water
heat the solution
evaporate the water
heat the solution
- If a solution contains more sodium chloride than is normally possible at that temperature, it is
supersaturated
saturated
unsaturated
insoluble
supersaturated
- Carbonated water is made by dissolving CO2 in water at a
high temperature
pressure lower than 1 atm
temperature which is gradually increased
pressure greater than 1 atm
pressure greater than 1 atm
- “Hard” water can be softened by
letting the calcium or magnesium ions settle out
passing it through an ion exchanger
chlorination
filtration
passing it through an ion exchanger
- If the molar mass of gas A is greater than the molar mass of gas B,
A diffuses more rapidly than B
B diffuses more rapidly than A
they both diffuse at the same rate
neither diffuses because they interfere with each other
B diffuses more rapidly than A
- If a gas A is heavier than gas B and they are both heated to the same temperature,
the molecules of A move faster than those of B
the molecules of A move more slowly than those of B
the molecules of both gases move at the same rate
the molecules move too quickly to determine which are moving faster
the molecules of A move more slowly than those of B
- If a substance is a gas, it
has a definite volume and shape
cannot be compressed
usually has a very high density
expands to fill the space it is in
expands to fill the space it is in
- All atoms are neutral because
all atoms contain neutrons
the charge of the protons balances the charge of the electrons
the charge of the protons cancels the charge of the neutrons
the total protons and neutrons equals the number of electrons
the charge of the protons balances the charge of the electrons
- A number used to predict the geometry of a molecule. It is equal to the number of atoms bonded to a central atom plus the number of lone pairs on the central atom.
steric number
coordination number
Avogadro’s number
carbon number
steric number
- A reaction in which an alkyl group is introduced into an aromatic ring.
Friedel-Crafts reaction
Shift reaction
Cannizzaro reaction
dehydration reaction
Friedel-Crafts reaction
- In CH3COOH and HCOOH, HCOOH will be
more acidic
less acidic
equally acidic
not acidic at all
more acidic
