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Test your basic knowledge |
MCAT Chemistry
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Study First
Subjects
:
mcat
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Expression of auto - ionization of water into H+ and OH- at a certain temperature - given by the product of the ions' molar concentrations. Denoted by Kw and equal to 10-
Water dissociation Constant
Dipole Dipole interaction
sigma bond
bond length
2. PH of a molecule at which it contains no net electric charge - isoelectric point.
Principle quantum number
Network covalent
pI
Magnetic quantum number
3. A structural formula in which electrons are represented by dots; dot pairs or dashes between two atomic symbols represent pairs in covalent bonds.
Lewis structure
Group 2A
Concentration
Rate law
4. Attractive and repulsive forces between molecules that are weaker than forces within molecules.
Hydrogen bonding
STP
Intermolecular forces
Disproportionation
5. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.
Group 7A
redox reaction
Lyman series
atomic radius
6. Structure that occurs when it is possible to draw two or more valid electron dot structures that have the same number of electron pairs for a molecule or ion
Proton
mole
empirical formula
Resonance structure
7. Second quantum number - designated by the letter 'l.' This 'angular momentum' refers to the subshells within each principle quantum energy level. It can take on the value of an integer in the 0 to (n -1) range. The four subshellscorresponding to l=0
azimuthal quantum number
angular momentum in the bohr model
single displacement reaction
Ionization energy
8. Sum of the protons and neutrons in an element often denoted by the letter A
Mass number
Formula weight
Charles and Gay Lussac's Law
amorphous solid
9. At a constant pressure - the volume of an ideal gas is directly proportinal to its temperature: V (a) T
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10. Product of the molar concentrations of dissociated ions in solution at any point in the reaction other than equilibrium or saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted IP.
Ion product
law of constant composition
Dispersion Forces
und's rule
11. A concentration unit of a solution expressed as moles of solute dissolved per liter of solution
Molarity
representative elements
angular momentum in the bohr model
Molality
12. 1913 - Niels Bohr - said that electrons formed specific layers instead or random ones - said atoms atoms absorb and give off energy when the electrons move from one shell to another
atomic radius
The bohr model
polymer
Strong acid
13. An elementary particle with 0 charge and mass about equal to a proton
Mass number
Neutron
Nucleus
amorphous solid
14. Rare earth element group (elements 58-71)
lathanide series
Azeotrope
Activation energy
gram equivalent weight
15. A horizontal row of elements in the periodic table
Intermolecular forces
Aqueous Solution
electron configuration
Period
16. A definite stable energy that a physical system can have
Combination Reaction
electrolysis
energy state
chemical reaction
17. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds
Lewis structure
Group 4A
Conjugate acids and Bases
Resonance structure
18. One - half of the distance between the center of identical atoms that are not bonded together. Since effective nuclear charge increases when moving from left to right each additional electron is pulled more strogly toward the nucleus.
atomic radius
Percent composition
actinide series
Lewis acid base reaction
19. A graph of pressure versus temperature that shows the conditions under which the phases of a substance exist
Covalent Bond
Ion
Phase diagram
Bronsted - Lowry definition
20. The percent by mass of each element in a compound
Net ionic equation
percent composition
decomposition reaction
Formula weight
21. Mixture of 2 or more substances that distills at a constant temperature and with constant composition - even though seperately the components have different boiling points
redox reaction
Lewis acid base reaction
Combination Reaction
Azeotrope
22. The weight in grams of one mole of a given elementand is expressedin tems of grams per mole.
Graham's Law
Atomic weight
Resonance structure
Electronegativity
23. A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion
Percent composition
Neutralization reaction
Ionic Bond
Nonpolar covalent bond
24. Halogens; ns2np5 - - 2nd most reactive group - The Halogens; very active because of need to fill; form -1 ions; 7 electrons in valence shell; tend to form salts with elements from groups 1A and 2A
single displacement reaction
Group 7A
Octet Rule
crystalline solid
25. Elements in the middle of the periodic table - in groups 3-12.
electron configuration
Bronsted Lowry
Reaction mechanism
transition elements
26. (chemistry) a substance that changes color to indicate the presence of some ion or substance
indicator
Bronsted - Lowry definition
Reaction mechanism
Azeotrope
27. A set of spectral lines that appear in the visible light region when a hydrogen atom undergoes a transition from energy levels n>2 to n=2.
Intermolecular forces
Balmer series
Dipole Dipole interaction
azimuthal quantum number
28. When polar molecules orient themselves such that the positive region of one molecule is close to the negative region of another molecule.
Bronsted Lowry
Dipole Dipole interaction
actinide series
VSEPR
29. When a solute is dissolved in a solvent - it will dissociate until reaching an equilibrium point at which the rate of dissociation equals the rate of precipitation of the solute - regardless of any additional solute introduced into the mixture
Percent yield
Solution equilibrium
Phase diagram
electron affinity
30. Temperature is constant; effusion and temperature are proportional to the square root of their masses
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31. Set of spectral lines appearing in the UV region when a hydrogen atom undergoes a transition from energy levels n>1 to n=1.
actinide series
Effusion
Lyman series
molecule
32. An equilibrium expression used to measure weak - acid strength - given by the ratio of the product of the products' molar concentrations to the product of the reactants' molar concentrations - with each term raised to the power of its stoichiometric
actinide series
Combination Reaction
Arrhenius Definition
Acid dissociation constant
33. A set of frequencies of electromagnetic waves given off by atoms of an element; consists of a series of fine lines of individual colors
Net ionic equation
Emperical Formula
atomic emission spectrum
Alkaline earths
34. The tendency for an atom to attract electrons to itself when it is chemically combined with another element
Emperical Formula
Equivalence point
Electronegativity
pI
35. 5 valence electrons -3 ions - Nitride N
Pauli exclusion principle
Henderson Hasselbalch Equation
amorphous solid
Group 5A
36. The quantum number that has only two possible values - +1/2 and -1/2 - which indicate the two fundamental spin states of an electron in an orbital
indicator
subshell
Charles and Gay Lussac's Law
Spin quantum number
37. A subdivision of an energy level in an atom. They are divided into orbitals.
Water dissociation Constant
subshell
Diffusion
molecule
38. The formation of one or more covalent bonds between an electron pair donor and an electron pair acceptor
sigma bond
Planck's Constant
Lewis acid base reaction
Decomposition reaction
39. The amount of product that can be made in a chemical reaction based on the amount of limiting reactant
Intermolecular forces
Bronsted Lowry
Theoretical yield
Concentration
40. Play- by- play showing the individual steps of a reaction - including the formation and destruction of any reaction intermediates that may occur.
Molality
Reaction mechanism
Avagadros number
bond energy
41. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance
Network covalent
chemical reaction
Solute
decomposition reaction
42. The quantum number that indicates the main energy level occupied by the electron. Can theoretically take on any positive interger. Denoted by the letter n.
Principle quantum number
Network covalent
Arrhenius Definition
polymer
43. The molar amount of a solute that can dissolve in 1L of solvent until equilibrium - saturation - is reached
Molar solubility
Lyman series
Decomposition reaction
angular momentum in the bohr model
44. Contains nonmetals that are non - reactive. Full outermost energy level except helium which has 2.
representative elements
empirical formula
Noble gases
Rate law
45. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance C>>>>A+B
Vapor pressure
Decomposition reaction
Atomic weight
lathanide series
46. A physical property of a solution that depends on the number - but not the identity - of the disswolved solute particles; example properties include vapor pressure lowering - boiling point elevation - osmotic pressure - and frezzing point depression
molecule
single displacement reaction
Colligative properties
Raoult's Law
47. Sum of all the masses - in AMU - present in one molecule of a molecular compound.
Equlibrium constant
Atomic weight
Formula weight
Solution equilibrium
48. The process of decomposing a chemical compound by the passage of an electric current.
electrolysis
Henderson Hasselbalch Equation
Collision theory of chemical Kinetics
Balmer series
49. The ratio of the number of moles of solute dissolved in one kilogram of solvent. molality (M = moles solute/kg of solution)
Bronsted - Lowry definition
Molality
Disproportionation
molecular weight
50. The amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon -12
mole
Ground state
Planck's Constant
Redox Half Reaction