ACS Chemistry Final Exam 2, General
Questions and Actual Answers 2026.
What is the most complete and best description of a covalent bond? - Answer A system of
two nuclei where each atom donates one electron to the other atom, thus forming a bond
What is not a characteristic of ionic substances? - Answer Their reactions are generally
extremely slow.
Characteristics of Ionic Substances - Answer -They conduct an electric current when fused.
-Those having a common ion exhibit some similar chemical properties.
-They lower the vapor pressure of water when dissolved in it.
-They raise the boiling point of water when dissolved in it.
The addition of a catalyst in a chemical reaction - Answer Provides an alternate path with a
different activation energy.
What procedure will lower the activation energy for a particular reaction? - Answer adding a
catalyst
What's an accurate description of the behavior of a catalyst? - Answer A catalyst reduces the
activation energy for a reaction and increases the rate of a reaction.
What exactly do Catalysts do? - Answer Alter the pathway (mechanism) of a chemical
reaction.
Which group of ions can exist together in water solution in moderate concentration? - Answer
K+, Cl-, Na+, NO3-
In which process is entropy decreases in what process? - Answer freezing water
When equal volumes of 0.1 M solutions of HCl and NaOH are mixed, the total number of ions
present will be approximately - Answer Half as great as before
Ion - Answer An atom or group of atoms that has gained or lost one or more electrons, thus
acquiring a charge.
, A species of an element in which the number of electrons does not equal the number of
protons.
Energy of a photon is greatest in case of a - Answer x-rays.
Photon - Answer A particle of electromagnetic radiation with no mass that carries a quantum
of energy. A discrete amount.
packet of energy whose quantity is related to the frequency of the electromagnetic radiation
Regions of the Electromagnetic Spectrum (from highest frequency to lowest inversely related to
wavelength) - Answer Gamma, X-ray, Ultra-violet, visible light, Infrared, Microwave, Radio
The higher the frequency, the ______ the photon energies. - Answer higher
Elements with ____ ionization readily lose electrons to form positive ions.
high/low - Answer low
Elements with ____ electron affinity ready accept electrons to form negative ions. - Answer
high
TRUE/FALSE
Do these two match up?
low ionization energy + high electron affinity - Answer TRUE.
molarity - Answer moles of solute/Liters of solution; mmols/mL
What is a Polar Molecule? - Answer A molecule that is mostly positive on one side and mostly
negative on the other.
Hydrogen Bonding - Answer When hydrogen is attracted to electronegative atoms.
Coordinate Covalent Bonding - Answer A covalent bond in which the two electrons derive
from the same atom; occurs most often between Lewis acids and bases.
Questions and Actual Answers 2026.
What is the most complete and best description of a covalent bond? - Answer A system of
two nuclei where each atom donates one electron to the other atom, thus forming a bond
What is not a characteristic of ionic substances? - Answer Their reactions are generally
extremely slow.
Characteristics of Ionic Substances - Answer -They conduct an electric current when fused.
-Those having a common ion exhibit some similar chemical properties.
-They lower the vapor pressure of water when dissolved in it.
-They raise the boiling point of water when dissolved in it.
The addition of a catalyst in a chemical reaction - Answer Provides an alternate path with a
different activation energy.
What procedure will lower the activation energy for a particular reaction? - Answer adding a
catalyst
What's an accurate description of the behavior of a catalyst? - Answer A catalyst reduces the
activation energy for a reaction and increases the rate of a reaction.
What exactly do Catalysts do? - Answer Alter the pathway (mechanism) of a chemical
reaction.
Which group of ions can exist together in water solution in moderate concentration? - Answer
K+, Cl-, Na+, NO3-
In which process is entropy decreases in what process? - Answer freezing water
When equal volumes of 0.1 M solutions of HCl and NaOH are mixed, the total number of ions
present will be approximately - Answer Half as great as before
Ion - Answer An atom or group of atoms that has gained or lost one or more electrons, thus
acquiring a charge.
, A species of an element in which the number of electrons does not equal the number of
protons.
Energy of a photon is greatest in case of a - Answer x-rays.
Photon - Answer A particle of electromagnetic radiation with no mass that carries a quantum
of energy. A discrete amount.
packet of energy whose quantity is related to the frequency of the electromagnetic radiation
Regions of the Electromagnetic Spectrum (from highest frequency to lowest inversely related to
wavelength) - Answer Gamma, X-ray, Ultra-violet, visible light, Infrared, Microwave, Radio
The higher the frequency, the ______ the photon energies. - Answer higher
Elements with ____ ionization readily lose electrons to form positive ions.
high/low - Answer low
Elements with ____ electron affinity ready accept electrons to form negative ions. - Answer
high
TRUE/FALSE
Do these two match up?
low ionization energy + high electron affinity - Answer TRUE.
molarity - Answer moles of solute/Liters of solution; mmols/mL
What is a Polar Molecule? - Answer A molecule that is mostly positive on one side and mostly
negative on the other.
Hydrogen Bonding - Answer When hydrogen is attracted to electronegative atoms.
Coordinate Covalent Bonding - Answer A covalent bond in which the two electrons derive
from the same atom; occurs most often between Lewis acids and bases.
