Praxis 5440 - Physical Sciences –
Chemistry Questions and Answers
Graded A+
What is the name of the process by which a solid turns into a gas without becoming a liquid?
✔✔Sublimation
What is the term for a substance that speeds up a chemical reaction without being consumed in
the process?
✔✔Catalyst
What is the law that states that the total mass of reactants equals the total mass of products in a
chemical reaction?
✔✔Law of conservation of mass
What is the pH level of a neutral solution?
✔✔7
What is the term for a substance that donates protons (H⁺) in a chemical reaction?
1
,✔✔Acid
What is the chemical symbol for sodium?
✔✔Na
What is the process by which a liquid changes into a solid?
✔✔Freezing
What is the term for the amount of space an object occupies?
✔✔Volume
What is the term for the bond formed when two atoms share electrons?
✔✔Covalent bond
What is the unit of measurement for electric current?
✔✔Ampere
2
,What is the name for a substance that increases the concentration of hydroxide ions (OH⁻) in a
solution?
✔✔Base
What is the term for the process in which a gas turns into a liquid?
✔✔Condensation
What is the chemical symbol for carbon?
✔✔C
What is the term for the tendency of an atom to attract electrons in a chemical bond?
✔✔Electronegativity
What is the type of bond formed between two metals?
✔✔Metallic bond
What is the name for the chemical reaction in which a compound breaks down into two or more
simpler substances?
3
, ✔✔Decomposition reaction
What is the term for the process by which a gas turns into a solid?
✔✔Deposition
What is the law that states that the volume of gas is directly proportional to the temperature,
provided the pressure is constant?
✔✔Charles' Law
What is the term for the number of protons in the nucleus of an atom?
✔✔Atomic number
What is the term for a molecule with a slight positive charge on one side and a slight negative
charge on the other side?
✔✔Polar molecule
What is the chemical formula for methane?
✔✔CH₄
4
Chemistry Questions and Answers
Graded A+
What is the name of the process by which a solid turns into a gas without becoming a liquid?
✔✔Sublimation
What is the term for a substance that speeds up a chemical reaction without being consumed in
the process?
✔✔Catalyst
What is the law that states that the total mass of reactants equals the total mass of products in a
chemical reaction?
✔✔Law of conservation of mass
What is the pH level of a neutral solution?
✔✔7
What is the term for a substance that donates protons (H⁺) in a chemical reaction?
1
,✔✔Acid
What is the chemical symbol for sodium?
✔✔Na
What is the process by which a liquid changes into a solid?
✔✔Freezing
What is the term for the amount of space an object occupies?
✔✔Volume
What is the term for the bond formed when two atoms share electrons?
✔✔Covalent bond
What is the unit of measurement for electric current?
✔✔Ampere
2
,What is the name for a substance that increases the concentration of hydroxide ions (OH⁻) in a
solution?
✔✔Base
What is the term for the process in which a gas turns into a liquid?
✔✔Condensation
What is the chemical symbol for carbon?
✔✔C
What is the term for the tendency of an atom to attract electrons in a chemical bond?
✔✔Electronegativity
What is the type of bond formed between two metals?
✔✔Metallic bond
What is the name for the chemical reaction in which a compound breaks down into two or more
simpler substances?
3
, ✔✔Decomposition reaction
What is the term for the process by which a gas turns into a solid?
✔✔Deposition
What is the law that states that the volume of gas is directly proportional to the temperature,
provided the pressure is constant?
✔✔Charles' Law
What is the term for the number of protons in the nucleus of an atom?
✔✔Atomic number
What is the term for a molecule with a slight positive charge on one side and a slight negative
charge on the other side?
✔✔Polar molecule
What is the chemical formula for methane?
✔✔CH₄
4
