Chemistry Quiz

IS MATTER AROUND US PURE: What is the difference between a compound and a mixture?

• A compound is a combination of substances that are not chemically combined

• A compound is a type of mixture

• A mixture is formed by the chemical combination of elements

• A compound is formed by the chemical combination of elements, while a mixture is a combination of substances that are not chemically combined.

IS MATTER AROUND US PURE: How can you separate a mixture of sand and water?

• Magnetic separation

• Filtration

• Evaporation

• Decantation

IS MATTER AROUND US PURE: What is the process of sublimation?

• The process of sublimation is the change from solid to gas without passing through the liquid state.

• Sublimation is the process of changing from gas to liquid without passing through the solid state.

• Sublimation is the process of changing from gas to solid without passing through the liquid state.

• The process of sublimation is the change from liquid to gas without passing through the solid state.

IS MATTER AROUND US PURE: Define the term 'colloid' and give an example.

• Milk is an example of a colloid.

• Salt water is an example of a colloid

• Iron is an example of a colloid

• Oxygen is an example of a colloid

ATOMS AND MOLECULES: What is the difference between an atom and a molecule?

• An atom is larger than a molecule

• An atom is the smallest unit of an element, while a molecule is a group of atoms bonded together.

• An atom and a molecule are the same thing

• An atom is made up of multiple elements, while a molecule is made up of a single element

ATOMS AND MOLECULES: How many atoms are present in a molecule of water?

• 5

• 10

• 3

• 1

ATOMS AND MOLECULES: Define the term 'valency' of an element.

• Combining capacity of an atom

• The boiling point of an element

• The atomic weight of an element

• The color of an element

ATOMS AND MOLECULES: What is the molecular mass of carbon dioxide (CO2)?

• 56

• 44

• 30

• 12

STRUCTURE OF ATOM: What are the subatomic particles present in an atom?

• Protons, Neutrons, and Positrons

• Photons, Neutrons, and Electrons

• Protons, Neutrons, and Electrons

• Protons, Electrons, and Quarks

STRUCTURE OF ATOM: Explain the concept of atomic number and mass number.

• The atomic number is the number of neutrons in the nucleus of an atom, while the mass number is the total number of protons and electrons in the nucleus.

• The atomic number is the number of protons and neutrons in the nucleus of an atom, while the mass number is the total number of protons and electrons in the nucleus.

• The atomic number is the number of protons in the nucleus of an atom, while the mass number is the total number of protons and neutrons in the nucleus.

• The atomic number is the number of electrons in the nucleus of an atom, while the mass number is the total number of electrons and protons in the nucleus.