For the following balanced reaction, which of the following is a gas?
2 Na(l) + Cl2(g) → 2 NaCl(s)
A) Na
B) 2 Na
C) Cl2
D) Cl
E) NaCl
Answer:
Which best describes the intrinsic motion of stars?
A) their circular motion across the sky in a 24-hour period
B) their apparent yearly cycle around the Sun, due to Earth’s revolution
C) their motion relative to all other bodies
D) their motion relative to Earth
Answer:
Consider the boiling points of the following compounds and their solubilities in
room-temperature water. Why does the solubilities in water go down as the boiling
points of these alcohols go up.
A) Larger molecules are less attracted to one another by induced dipole-induced dipole
as well as by dipole-dipole and dipole-induced dipole attractions.
B) As the boiling increases, it is more difficult to keep the alcohol from evaporating out
of solution.
C) As the boiling point increases, the size of the alcohol molecules decreases.
D) Larger molecules are more attracted to one another by induced dipole-induced
dipole as well as by dipole-dipole and dipole-induced dipole attractions.
Answer:
As a hot iron ring cools, the diameter of the hole
A) increases.
B) decreases.
C) remains the same.
Answer:
Cumulus clouds generally occur in an atmospheric state of
A) stability.
B) instability.
C) cool, dry adiabatics.
D) warm, moist adiabatics.
Answer:
Features of the deep ocean basins include abyssal plains, ocean trenches, mid-ocean
ridges, and seamountsall of which are composed of
A) plutonic rock.
B) granite.
C) basalt.
Answer:
The glare seen from water in a lake is largely
A) horizontally polarized.
B) vertically polarized.
C) nonpolarized.
Answer:
When a pulse of white light is incident on a piece of glass, the first color to emerge is
A) red.
B) orange.
C) green.
D) violet.
E) all the same
Answer:
A scuba diver losing her air supply while far beneath the water surface is advised when
ascending to
A) hold air in her lungs.
B) allow air to escape her lungs.
C) swallow a bit of water.
D) panic.
Answer:
Nebular theory pertains to the formation of
A) the solar system.
B) a galaxy.
C) the asteroid belt.
D) the Earth.
Answer:
The image seen in a plane mirror is due to
A) specular reflection.
B) diffuse reflection.
C) both of these
D) neither of these
Answer:
Which of the following molecules contains a ketone?
A) a
B) b
C) c
D) a or b
E) all of the above
Answer:
Formaldehyde is a toxic preservative with the following chemical formula:
H2C O
Which of the following compounds would best serve as a starting point for its
production?
A) H3COH
B) H2C CH2
C) H2O
D) CH3CH2OH
E) none of the above
Answer:
When we think of electric potential difference, we are thinking about
A) current.
B) voltage.
C) resistance.
Answer:
Coal is formed from
A) anthracite.
B) deeply buried oil sediments.
C) swamps.
D) lithified peat.
Answer:
Which of the following reaction energies is the most endothermic?
A) 540 kJ/mole
B) -540 kJ/mole
C) 125 kj/mole
D) -125 kJ/mole
E) not enough information given
Answer:
The changing of a substance from a liquid into a vapor or gas is called
A) condensation.
B) evaporation.
C) dew point.
D) saturation point.
Answer:
When boiling your breakfast eggs while in the mountains, to compensate for altitude
you should
A) use a hotter flame.
B) boil the eggs for a shorter time.
C) boil the eggs for a longer time.
D) none of the above
Answer:
Buoyant force is greatest on a submerged
A) 10-N block of lead.
B) 10-N block of aluminum.
C) same on each
Answer:
Nitrogen dioxide and dinitrogen tetroxide are really
A) the same compound.
B) different compounds.
C) not possible as compounds.
D) best represented as NO.
Answer:
Which is not a phase of matter?
A) solids
B) liquids
C) gases
D) vacuum
Answer:
As a wave-generating object moves through a medium, the waves ahead
A) bunch up.
B) stretch out.
C) neither of these
Answer:
What is the cause of Jupiter’s slight flattening, which results in an equatorial diameter
6% greater than its polar diameter?
A) its rapid spin cycle
B) its massive gravitational pull
C) nuclear fission within its core
D) its frequent reversal of its magnetic poles
Answer:
The equivalent (combined) resistance of 1-ohm, 2-ohm, and 3-ohm in parallel is about
A) 0.06 ohm.
B) 1 ohm.
C) 1.8 ohms.
D) 6 ohms.
E) 9 ohms.
Answer:
No work is done by gravity on a bowling ball that rolls along a bowling alley because
A) no force acts on the ball.
B) no distance is covered by the ball.
C) the force on the ball is at right angles to its motion.
D) no potential energy converts to kinetic energy.
E) its kinetic energy may vary.
Answer:
Evidence for the existence of neutrons did not come until many years after the
discoveries of the electron and the proton. Give a possible explanation.
A) The neutron is nearly massless.
B) The neutron is only slightly more massive than the proton.
C) The discovery required the use of ultrafast computers.
D) The neutron lacks an electrical charge.
Answer:
The last minerals to crystallize from a cooling magma have a
A) high melting point and a low silica content.
B) low melting point and a high silica content.
C) high melting point and a high silica content.
D) low melting point and a low silica content.
Answer:
Electric and magnetic fields combine to produce
A) sound.
B) light.
C) both of these
D) none of the above
Answer:
The frequency of a generated electromagnetic wave matches the
A) field strength of the fields.
B) energy of the fields.
C) frequency of vibrating charges that produced it.
D) frequency of domains in the magnetic part of the wave.
Answer:
Newton’s law of cooling applies to things that are
A) cooling.
B) warming.
C) both of these
D) none of the above
Answer:
A bare roof of a warmly heated home on a snowy day indicates
A) an unwanted flow of heat.
B) good insulation.
C) a change of phase.
D) all of the above
Answer:
A rough surface for infrared waves may be polished for
A) radio waves.
B) light waves.
C) both of these
D) neither
Answer:
Suggest why sodium chloride, NaCl, is insoluble in gasoline. Consider the electrical
attractions.
A) Since this molecule is so small, there is not much opportunity for the gasoline to
interact with it through any electrical attractions.
B) Since gasoline is a very polar molecule, the salt can only form dipole-induced dipole
bonds, which are very weak, giving it a low solubility in gasoline.
C) Since gasoline is so strongly attracted to itself, the salt, NaCl is excluded.
D) Salt is composed of ions that are too attracted to themselves. Gasoline is non-polar
so salt and gasoline will not interact very well.
Answer:
The most common igneous rock is formed from
A) basaltic magma.
B) andesitic magma.
C) granitic magma.
D) none of these
Answer: