Chemistry Final Exam Practice Test2013
Multiple Choice:
Choose the best answer to each question. Write the letter for that answer to the left of the question number.
- The study of the composition and structure of matter is the domain of___.
a)physics
b)biology
c)chemistry
d)geology
- All types of matter
a)have fixed volumes and weight.
b)Change their mass depending on location.
c)Change their mass depending on temperature
d)Have mass and take up space
- Which of the following CANNOT be classified as a substance?
a)table salt
b)air
c)nitrogen
d)gold
- A gas is a form of matter that___.
a)has a definite volume
b)is generally a liquid or solid at room temperature
c)takes the shape of its container
d)is difficult to compress
- Which state of matter is characterized by low density and high compressibility?
a)gas
b)liquid
c)solid
- Which of the following is a physical change?
a)corrosion
b)explosion
c)evaporation
d)food spoilage
1) C 2) D 3) B 4) C 5) A 6) C
- Which of the following is a heterogeneous mixture?
a)air
b)brine (salt water)
c)steel
d)soil
- Which of the following is a homogeneous mixture?
a)oil in water
b)soot in water
c)Kool-Aid in water
- A homogeneous substance that can be separated into two or more pure substances only by a chemical change is a(n) _____.
a)phase
b)element
c)mixture
d)compound
e)solution
- What is the chemical symbol for lead?
a)Ag
b)Fe
c)Na
d)Pb
e)Sn
- What is the name of the element having the chemical symbol Ag?
a)antimony
b)copper
c)iron
d)lead
e)silver
- Approximately how many elements exist in nature?
a)30
b)100
c)1,000
d)10,000
e)1,000,000
7) D 8) C 9) D 10) D 11) E 12) B
- An isotope has
a)the same number of protons and electrons
b)the same number of protons but a different number of neutrons
c)the same number of protons but a different number of electrons
d)the same number of neutrons but a different number of protons
- Which of the following processes does NOT involve a change in chemical properties?
a)rusting
b)fermenting
c)boiling
d)burning
- Which of the following is true for all chemical reactions?
a)The total mass of the reactants increases.
b)The total mass of the products is greater than the total mass of the reactants.
c)Water is given off
d)The total mass of the reactants equals the total mass of the products.
- How many neutrons are in boron.
a)5
b)6
c)11
- Three different people weigh a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 g for the mass of the standard. These results imply that the balance that was used is____.
a)accurate
b)precise
c)accurate and precise
d)neither accurate nor precise
- The radius of the earth is 6 378 km. What is the number expressed in scientific notation?
a)6.378 x 10-3 km
b)6.378 x 103 km
c)6.378 x 102 km
d)63.78 x 103 km
13) B14) C15) D16) B17) B18) B
- What is the result of multiplying these two numbers:
(2.5 x 1010) x (3.5 x 10-7)?
a)8.8 x 10-3
b)8.8 x 1017
c)8.8 x 103
d)8.8 x 10-17
- How many significant figures are there in the measurement 40 600 mg?
a)two
b)three
c)four
d)five
e)This cannot determined
- Which of the following measurements is exposed to three significant figures?
a) 0.007
b) 7077 mg
c) 7.30 x 10-7 km
d) 0.070 mm
- What is the measurement 1047 L rounded off to two significant figures?
a)1.0 x 103 L
b)1040 L
c)1050 L
d)1.1 x 103 L
e)None of the above
- Express the sum of 1,111 km and 222 km using the correct number of significant digits.
a)1,300 km
b)1, 330
c)1,330. km
d)1,333 km
e)1,333.0 km
- What quantity is represented by the metric system prefix centi-?
a)1,000
b)100
c)0.01
d)0.1
e)0.001
19) C20) B21) C22) A23) D24) C
- What is the metric system prefix for the quantity 0.001
a)centi-
b)deci-
c)kilo-
d)milli-
e)micro-
- What is the quantity 7,896 millimeters expressed in meters?
a)7.896 m
b)78.96 m
c)789.6 m
d)789,600 m
e)7,896,000 m
- What is the volume of a salt crystal measuring 2.44 x 10-2 m by 1.4 x 10-3 m by 8.4 x 10-3 m?
a)2.9 x 10-7 m3
b)2.9 x 10-6 m3
c)2.9 x 10-5 m3
d)2.9 x 10-4 m3
- The density is found by dividing ___.
a)mass by volume
b)volume by mass
c)mass by area
d)area by mass
e)mass by length
- If the temperature of a piece of steel is lowered, what happens to its density?
a)The density decreases
b)The density increases
c)The density does not change
d)The density first increases, then decreases
e)The density first decreases, then increases
- What is the volume of 82.0 g of ether if the density of ether is 0.75 g/ml?
a)56.0 ml
b)1.09 x 102 ml
c)8.93 x10-3 ml
d)6.05 x102 ml
25) D26) A27) A28) A29) B30) B
- What is the temperature –34 C expressed in Kelvins?
a)139 K
b)207 K
c)239 K
d)307 K
e)339 K
- What is the boiling temperature of water at 1 atmosphere of pressure in kelvins?
a)0 K
b)100 K
c)273 K
d)373 K
e)473 K
- If the temperature changes by 100 K, by how much does it change in C?
a)0 C
b)37 C
c)100 C
d)273 C
e)373 C
- How many centimeters are there in 1 meter?
a)1 x 10-5 cm
b)1 x 10-3 cm
c)1 x 103 cm
d)1 x 102 cm
- What is the smallest particle of an element that retains the properties of that element?
a)an atom
b)an electron
c)a proton
d)a neutron
e)a molecule
- Who was the first person to suggest the idea of atoms, in the fourth century B.C.?
a)Atoms
b)Dalton
c)Democritus
d)Galileo
e)Thomson
31) C32) D33) C34) D35) A36) C
- Which of the following is NOT a part of Dalton’s atomic theory?
a)All elements are composed of atoms.
b)Atoms are always in motion.
c)Atoms of the same element are the same.
d)Atoms that combine do so in simple whole-number ratios.
- Select the correct statement about subatomic particles.
a)Electrons are negatively charged and are the heaviest subatomic particle.
b)Protons are positively charged and the lightest subatomic particle..
c)Neutrons have no charge and are the lightest subatomic particle.
d)The mass of a neutron nearly equals the mass of a proton.
e)Electrons, protons, and neutrons all have the same mass.
- The nucleus of an atom ____.
a)is composed of protons and neutrons
b)is composed of protons and electrons
c)occupies a large part of the atom
d)is the lightest part of the atom
e)has no charge
- The nucleus of an atom is ____.
a)positively charged and has a high density
b)positively charged and has a low density
c)negatively charged and has a high density
d)negatively charged and has a low density
- All atoms are ____.
a)positively charged, with the number of protons exceeding the number of electrons
b)negatively charged, with the number of electrons exceeding the number of protons
c)neutral, with the number of protons equaling the number of electrons
d)neutral, with the number of protons equaling the number of electrons, which is equal to the number of neutrons
e)neutral, with the number of protons equaling the number of neutrons, which is equal to half the number of electrons
- All atoms of the same element have the same ____.
a)number of neutrons
b)number of protons
c)mass numbers
d)mass
37) B38) D39) A40) A41) C42) B
- The number of neutrons in the nucleus of an atom can be calculated by ____.
a)adding together the number of electrons and protons
b)subtracting the number of electrons from the number of protons
c)subtracting the atomic number from the mass number
d) adding the mass number to the number of electrons
- Which of the following equals one atomic mass unit?
a)the mass of one electron
b)the mass of one helium atom
c)the mass of one carbon atom
d)one-twelfth the mass of one carbon atom
e)one gram
- Isotopes of the same element have different _____.
a)Positions on the periodic table
b)Atomic numbers due to a different number of electrons
c)Atomic numbers due to a different number of protons
d)Mass numbers due to a different number of neutrons
e)Charges
- In which of the following is the number of neutrons correctly represented?
a)199F has 0 neutrons
b)7533As has 108 neutrons
c)2412Mg has 24 neutrons
d)19779Au has 79 neutrons
e)23892U has 146 neutrons
- How do isotopes hydrogen-1 and hydrogen-2 differ?
a)hydrogen-2 has one more electron than hydrogen-1
b)hydrogen-2 has one neutron; hydrogen-1 has none
c)hydrogen-2 has two protons; hydrogen-1 has one
d)hydrogen-1 has no protons; hydrogen-2 has one
- Which of the following categories includes the majority of the elements?
a)Gases
b)liquids
c)metals
d)nonmetals
e)metalloids
43) C44) D45) D46) E47) B48) C
- A mystery element Q is a nonlustrous solid and a poor conductor of electricity. To what category of elements does it belong?
a)Metals
b)Nonmetals
c)Transition metals
d)Semimetals
e)metalloids
- Group A elements are known as the ____.
a)Representative elements
b)Transition elements
c)Inner transition elements
d)Periodic elements
e)Metallic elements
- A column of elements in the periodic table is known as a ____.
a)row
b)list
c)group
d)transition
e)period
- In which of the following is the symbol for the ion and the number of electrons it contains given correctly?
a)S2- has 2 electrons
b)Br– has 34 electrons
c)Al3+ has 16 electrons
d)Ca2+ has 18 electrons
e)H+ has one electron
- What type of ions have names ending in –ide?
a)only cations
b)only anions
c)only metal ions
d)only gaseous ions
e)only metalloid ions
- Ions form when atoms gain or lose ____.
a)protons
b)neutrons
c)electrons
d)atomic number
e)mass number
49) B50) A51) C52) D53) B54) C
- A cation is any atom or group of atoms with ____.
a)a positive charge
b)no charge
c)a negative charge
d)more electrons than the corresponding atoms
- Which of the following is a pure compound?
a)salt water
b)fresh air
c)aluminum
d)calcium iodide
e)neon
- Which of the following statements is true concerning the composition of ionic compounds?
a)They are composed of anions and cations
b)They are composed of anions only
c)They are composed of cations only
d)They are formed from two or more nonmetallic elements
e)They are formed from two or more metallic elements.
- Molecular compounds are usually ____.
a)composed of two or more transition elements
b)composed of positive and negative ions
c)composed of two or more nonmetallic elements
d)exceptions to the law of definite proportions
e)solids at room temperature
- Which element when combined with fluorine would most likely form an ionic compound?
a)lithium
b)carbon
c)phosphorus
d)chlorine
- Compounds that are composed of ions ____.
a)are molecular compounds
b)have relatively high melting and boiling points
c)are for the most part composed of two or more metallic elements
d)fit all of the above descriptions
55)A56) D57) A58) C59) A60) B
- Select the correct statement concerning the formula C2H6O
a)It is a molecular formula
b)It is a formula unit
c)It gives information about molecular structure
d)It is the formula of an ionic compound
e)It represents a molecule made of 1 carbon atom, 2 hydrogen atoms, and 6 oxygen atoms.
- A molecular formula ____.
a)gives information about molecular structure
b)can be written for ionic compounds
c)shows the number and kinds of atoms in a molecule of a compound
d)show the number of atoms of each kind by a superscript written after the symbol
- In which of the following groups of ions are the charges all shown correctly?
a) Li- , O2- , S2+
b) Ca2+ , Al3+ , Br-
c) K-2 , F- , Mg2+
d)Na+ , I- , Rb-
e)Be2+ , Cl2- , Sr2+
- What happens to electronegativity as I go down a group.
a)Electronegativity decreases
b)Electronegativity increases
c)Electronegativity first increases then decreases
d)Electronegativity first decreases then increases
e)none of the above
- Which set of chemical name and chemical formula for the same compound is correct?
a)ammonium sulfite, (NH4)2S
b)iron(lll)phosphate, FePO4
c)potassium chloride, K2CI
d)magnesium dichromate, MgCrO4
e)lithium carbonate, LiCO3
- The names of all binary compounds, both ionic and molecular, end in____.
a)-ide
b)-ite
c)-ade
d)-ate
e)-en
61) A62) C63) B64) A65) B66) A
- Which of the following is a binary molecular compound?
a)BeHCO3
b)PCl5
c)Agl
d)Cr2O3
e)MgS
- The correct formula for sulfuric acid is _____.
a)H2SO3
b)H2SO4
c)H2SO2
d)H2SO
e)H2S
- Who discovered the electron?
a)Joseph Thomson
b)Niels Bohr
c)Ernest Rutherford
d)John Dalton
e)Albert Einstein
- When an electron moves from a lower to a higher energy level, the electron _____.
a)always doubles its energy
b)absorbs a continuously variable amount of energy
c)absorbs a quantum of energy
d)moves closer to the nucleus
- Which of the following scientists developed the quantum mechanical model of the atom?
a)Albert Einstein
b)Erwin Schrodinger
c)Niels Bohr
d)Ernest Rutherford
e)Joseph Thomson
- What is the probability of finding an electron within the region indicated by the drawn electron cloud?
a)50%
b)67%
c)75%
d)90 %
e)100%
67) B68) B69) A70)C71) B72) D
- How many energy sublevels are there in the second principal energy level?
a)1
b)2
c)3
d)4
e)5
- How many f orbitals are available?
a)1
b)3
c)5
d)7
e) 9
- What is the maximum number of electrons in the second principal energy level?
a)2
b)8
c)18
d)32
- The formula 2n2 represents _____.
a)The number of orbitals in a sublevel
b)The maximum number of electrons that can copy an energy level
c)The number of sublevels in any energy level
d)None of the above
- Which of the following energy levels has the lowest energy?
a)3d
b)4s
c)4p
d)4f
- If only two electrons occupy two p orbitals, what is the direction of the spins of these two electrons?
a)Both up and down
b)Opposite
c)Parallel
d)None of these
73) B74) D75) B76) B77) B78) C
- How many unpaired electrons are there in a sulfur atom (atomic number 32)?
a)0
b)1
c)2
d)3
e)4
- Which of the following states that no more than two electrons can occupy an atomic orbital and that two electrons in the same orbital must have opposite spins?
a)Hund’s rule
b)Dalton’s theory
c)The Aufbau principle
d)The Pauli exclusion principle
- The electron configuration of potassium is ____.
a)1s22s22p23s23p24s1
b)1s22s22p103s23p3
c)1s22s23s23p63d1
d)1s22s22p63s23p64s1
- According to the Aufbau principle____.
a)An orbital may be occupied by only two electrons
b)Electrons in the same orbital must have opposite spins
c)Electrons enter orbitals of highest energy first
d)Electrons enter orbitals of lowest energy first
- Which of the following electron configuration is the most stable
a)4d55s2
b)4d45s1
c)4d35s2
d)4d25s4
- Which of the following electromagnetic wave have the highest frequencies?
a)Ultraviolet waves
b)X-rays
c)microwaves
d)gamma rays
e)infrared light waves
- How does the speed of light change as light moves from one distant star toward earth in the vacuum space?
a)The speed decreases
b)The speed increases
c)The speed remains constant
79)C80) D81) D82) D83) A84) D85) C
- An electron that has absorbed energy is said to be in its ?
a)Ground state
b)Excited State
c)Electromagnetic State
d)Electrostatic State
e)None of the above
- How many electrons fit on the third energy level?
a)8
b)18
c)32
d)2
- An object’s wavelength is inversely proportional to ?
a)mass
b)velocity
c)temperature
d)position
e)frequency
- According to the uncertainty principle, if the position of the moving particle is known, what other quantity cannot be known?
a)mass
b)temperature
c)charge
d)spin
e)velocity
- Who first arranged the elements according to atomic mass and noticed a periodic recurrence of their physical and chemical properties?
a)Louis Pasteur
b)Henry Moseley
c)Antoine Lavoisier
d)John Dalton
e)Dmitri Mendeleev
- The periodic law states that there is a periodic repetition of the physical and chemical properties of elements _____.
a)When they are arranged in order of increasing atomic mass
b)If only metals are considered
c)When they are arranged in order of increasing atomic radii
d)When they are arranged in order of increasing atomic number
86)B87) B88) E89) E90) E91) D
- Which of the following elements is in the same period as phosphorous?
a)carbon
b)magnesium
c)nitrogen
d)oxygen
- Which subatomic particle plays the greatest part in determining how an element will react chemically?
a)electron
b)neutron
c)proton
d)muon
e)quark
- What is another name for the representative elements?
a)noble gases
b)Group A elements
c)Group B elements
d)Group C elements
e)Transition elements
- Each period number in the periodic table corresponds to ____.
a)A principal energy level
b)An energy sublevel
c)An atomic mass
d)An atomic number
- What is the electron configuration of sulfur?
a)1s22s22p63s23p3
b)1s22s22p63s23p4
c)1s22s22p63s23p5
d)1s22s22p63s23p6
- Hoe does atomic radius change from left to right across a period in the periodic table?
a)it tends to decrease
b)it tends to increase
c)it does not change
d)it first increases, then decreases
e)it first decreases, then increases
92) B93) A94) B95)A96) B97) A
- Which of the following factor contributes to the relatively greater atomic size of the higher-atomic-number elements within a particular family of the periodic table?
a)more shielding of the outer electrons by the inner electrons
b)larger nuclei
c)greater number of protons
d)smaller number of valence electrons
- Atomic size generally ____.
a)increases as you move from left to right across a period
b)decreases as you move down a group
c)remains constant within a period
d)decreases as you move from left to right across a period
- For Group 2A metals, which electron is the most difficult to remove from a neutral atom?
a)the first
b)the second
c)the third
d)All the electrons are equally difficult to remove
- Which of the following factors contributes to the greater ionization energy of the elements on the right side of a period in the periodic table?
a)more shielding by inner electrons
b)larger nuclei
c)greater number of protons in nuclei with electrons at the same energy level
d)smaller number of valance electrons
- Why is the radius of a positive ion always less than the radius of its neutral atom?
a)The nucleus pulls the remaining electrons in closer
b)The number of protons is increased
c)The atomic orbitals contract all by themselves
d)Electron speed are reduced
- Which of the following elements has the lowest electronegativity?
a)lithium
b)carbon
c)oxygen
d)fluorine
98) A99) D100) C101) C102) A103) A
- What is the name given to the electrons in the highest occupied energy level of an atom?
a)Affinity electrons
b)Orbital electrons
c)Valence electrons
d)Anions
e)Cations
- How many valence electrons are there in an atom of magnesium?
a)2
b)3
c)4
d)5
e)6
- The octet rule states that once elements have reacted to form a compound they tend to have ____.
a)The electron configuration of a noble gas
b)More protons than electrons
c)More electrons in their principle energy level
d)More electrons than protons
- What is the electron configuration of the calcium ion?
a)1s22s22p63s23p6
b)1s22s22p63s23p4 4s2
c)1s22s22p63s23p5 4s1
d)1s22s22p63s2
e)1s22s22p63s23p3
- What does nitrogen do in order to achieve a noble-gas electron configuration?
a)gains 2 electrons
b)gains 3 electrons
c)loses 2 electrons
d)loses 3 electrons
e)none of these
- What does barium do to achieve a noble-gas electron configuration?
a)gains 2 electrons
b)gains 3 electrons
c)loses 2 electrons
d)loses 3 electrons
e)none of these
104) C105) A106) A107) A108) B109) C
- What is the formula of the ion formed when tin achieves a stable electron configuration?
a)K+
b)Mg3+
c)P 2-
d)Al4-
e)None of the above
- Which of the following occurs in an ionic bond?
a)Oppositely-charged ions attract
b)Two atoms share two electrons
c)Two atoms share more than two electrons
d)Like-charged ions attract
- A compound held together by ionic bonds is ____.
a)Formed by sharing electrons
b)Formed by transferring electrons
c)Held together by Electrostatic forces
d)Answer a and c
e)Answer b and c
- What is the formula unit of aluminum oxide?
a)AlO
b)Al2O
c)Al3O
d)AlO3
e)Al2O3
- Which of the following compounds has the formula KNO3
a)Potassium nitrate
b)Potassium nitride
c)Potassium nitrite
d)Potassium nitrogen oxide
- An ionic compound is ____.
a)A good conductor of electricity when melted or dissolved
b)Held together by ionic bonds
c)Composed of anions and cations
d)All of the above
110) E111) A112) E113) E114) A115) D
- Ionic compounds are normally in which physical state at room temperature?
a)solid
b)liquid
c)gas
d)plasma
- The melting temperature of potassium chloride is relatively ____.
a)high
b)variable
c)low
d)potassium chloride does not melt
- Which of the following particles are free to drift in metals?
a)protons
b)electrons
c)neutrons
d)pions
e)cations
- What is the basis of a metallic bond?
a)the attraction of metal ions for mobile electrons
b)the attraction between neutral metal atoms
c)the neutralization of protons by electrons
d)the attraction of oppositely-charged ions