General Chemistry Quiz

What does the percent composition by mass of an element in a compound represent?

• Mass of the compound

• Percentage of the compound

• Number of atoms

• Percentage of the element

What does a chemical equation represent?

• Reactants and products with chemical formulas

• Atomic structure of an element

• Physical properties of a compound

• Chemical bonding in a molecule

Which of the following is an evidence of a chemical reaction?

• Change in pressure

• Change in texture

• Evolution of gas

• Change in volume

What does Antoine Lavoisier's Law of Conservation of Mass state?

• Atoms can be created in a chemical reaction

• Atoms can be destroyed in a chemical reaction

• Mass is conserved in a chemical reaction

• Mass is not conserved in a chemical reaction

Which type of chemical reaction involves the exchange of ion pairs?

• Decomposition Reaction

• Double Replacement/Double Displacement/Metathesis

• Synthesis/Combination Reaction

• Single Replacement/Single Displacement

What does the principal quantum number indicate?

• Kind and shape of the orbitals being occupied by an electron

• Energy level or shell where an atomic orbital can be found

• Specific orbital within the sublevel where the electron is found

• Specific sublevel within a particular principal energy level

According to the Aufbau principle, which orbitals must electrons first occupy?

• Orbitals with the same energy

• Orbitals with lower energies

• Orbitals with higher energies

• Orbitals with opposite spins

What does the Pauli Exclusion Principle state?

• Two electrons can have the same set of quantum numbers

• Only one electron can occupy a given orbital

• Not two electrons can have the same set of quantum numbers

• Only two electrons can occupy a given orbital

Which type of substance contains net unpaired spins and is attracted by a magnet?

• Antiferromagnetic

• Ferromagnetic

• Diamagnetic

• Paramagnetic

What is the maximum number of electrons that can occupy the 'd' sublevel?

• 14

• 6

• 10

• 2