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Question 1
In atomic notation, what does the symbol Z represent?
- The atomic number, or number of protons
- The mass number
- The number of neutrons
- The net charge of the ion
Question 2
Which atoms do not form pi bonds?
- Larger atoms
- Smaller atoms
- Atoms with a full octet
- Atoms with unpaired electrons
Question 3
Adding a catalyst to a reaction changes the value of the equilibrium constant.
- True
- False
Question 4
Without any applied voltage, the cell potential of an electrolytic cell is:
- Always negative
- Always positive
- Always exactly zero
- Equal to the standard reduction potential of the cathode
Question 5
A weak acid is titrated with a weak base and the pH at the equivalence point is approximately 7. What does this suggest?
- The acid and the base are of equal strength
- The acid is stronger than the base
- The base is stronger than the acid
- The equivalence point has not yet been reached
Question 6
An alcohol containing two hydroxyl groups is called a ______.
Fill in the blank
Question 7
Two hydroxyl groups attached to the same carbon form a geminal diol, which is also known as a:
- Hydrate
- Enol
- Hemiacetal
- Acetal
Question 8
Which prefix is used for an alcohol group when it is not the highest-priority functional group?
- hydroxy-
- oxo-
- carboxy-
- alkoxycarbonyl-
Question 9
In amide nomenclature, substituents bonded to the nitrogen are labeled with a capital N-.
- True
- False
Question 10
In the IUPAC name of an ester, what does the first part of the name (the alkyl name) identify?
- The alkyl group from the esterifying alcohol
- The parent acid's carbon chain
- The amino substituent on the nitrogen
- The carbonyl oxygen
Question 11
Electrons are roughly ______ times lighter than protons.
Fill in the blank
Question 12
Which quantum number determines the shape and subshell of an orbital?
- The azimuthal quantum number
- The principal quantum number
- The magnetic quantum number
- The spin quantum number
Question 13
Which principle states that no two electrons in an atom can have the same set of four quantum numbers?
- Pauli exclusion principle
- Hund's rule
- Aufbau principle
- Heisenberg uncertainty principle
Question 14
Which rule explains why electrons occupy adjacent degenerate orbitals singly before pairing up in the same orbital?
- Hund's rule
- Pauli exclusion principle
- Aufbau principle
- Heisenberg uncertainty principle
Question 15
The Heisenberg uncertainty principle states that the position and momentum of an electron cannot both be known with perfect accuracy at the same time.
- True
- False
Question 16
Which principle describes electrons filling the lowest-energy orbitals first?
- Aufbau principle
- Hund's rule
- Pauli exclusion principle
- Heisenberg uncertainty principle
Question 17
The maximum number of electrons in a subshell with azimuthal quantum number L is ______.
Fill in the blank
Question 18
What is the maximum number of electrons that can occupy a shell with principal quantum number n?
- 2n²
- 4n + 2
- 2n + 1
- n²
Question 19
Which hydrogen emission series appears in the visible region of the spectrum?
- Balmer series
- Lyman series
- Paschen series
Question 20
Which two elements are the classic exceptions to Hund's rule and to the usual order of orbital filling?
- Chromium and copper
- Sodium and potassium
- Iron and nickel
- Helium and neon
Question 21
An atom in which all electrons are paired and which is weakly repelled by a magnetic field is described as:
- Diamagnetic
- Paramagnetic
- Ferromagnetic
Question 22
Rotational equilibrium occurs when there is no net torque acting on an object.
- True
- False
Question 23
A diol in which both hydroxyl groups are attached to the same carbon is called a:
- Geminal diol (hydrate)
- Vicinal diol
- Primary alcohol
- Carbonyl compound
Question 24
What is the common name of ethanal?
- Acetaldehyde
- Formaldehyde
- Propionaldehyde
- Acetone
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