Category 1
Which of the following describes the process of sublimation?
Solid to gas
Which subatomic particle has a positive charge?
Proton
What type of bond is formed when electrons are shared between atoms?
Covalent bond
Which element is the most electronegative?
Fluorine
What is the pH of a neutral solution at 25°C?
7
Which of the following is an example of an exothermic reaction?
a) Melting ice
b) Boiling water
c) Combustion of gasoline
d) Evaporating alcohol
c) Combustion of gasoline
What is the empirical formula for a compound with the molecular formula C6H12O6?
CH2O
In a redox reaction, the substance that loses electrons is:
Reduced
Which gas law states that the volume of a gas is directly proportional to its temperature, provided pressure is constant?
Charles's Law
Which of the following correctly represents the Lewis structure for water (H₂O)?
a) H-O-H
b) H=O=H
c) H-O-H with two pairs of dots around oxygen
d) H-O-H with four pairs of dots around oxygen
c) H-O-H with two pairs of dots around oxygen
Which of the following represents an isotope?
a) ¹²C and ¹²O
b) ¹²C and ¹³C
c) ¹²C and ¹⁴C
d) Both b and c
d) Both b and c
What is the oxidation state of sulfur in H₂SO₄?
c) +6
The number of moles of solute per liter of solution is known as:
Molarity
What is the product of the reaction between an acid and a base?
Salt and water
Which of the following is a property of ionic compounds?
a) High melting points
b) Poor electrical conductivity in solid form
c) Solubility in water
d) All of the above
c) Solubility in water
Which of the following ions has the smallest radius?
a) Na+
b) Mg2+
c) Al3+
d) K+
c) Al3+
What is the chemical formula for ammonium sulfate?
(NH₄)₂SO₄
What is the name of the process in which a solid is separated from a liquid in a heterogeneous mixture?
Filtration
What is the main intermolecular force present in water?
Hydrogen bonding
Which of the following metals will react most vigorously with water?
a) Magnesium
b) Aluminum
c) Potassium
d) Iron
c) Potassium
Which functional group is present in alcohols?
a) Carboxyl group
b) Amino group
c) Hydroxyl group
d) Carbonyl group
Hydroxyl group
What is the common name for the compound NaHCO₃?
Baking soda
What type of nuclear reaction powers the sun?
Nuclear fusion
which type of radioactive decay results in a +β being emitted
Positron emission
Which statement describes a property of gases according to the kinetic molecular theory?
a) Gas particles are in constant, random motion
b) Gas particles attract each other
c) Gas particles have significant volume
d) Gas particles move slower at higher temperatures
a) Gas particles are in constant, random motion