WorksheetsAP Chemistry Thou Shall Not
Total questions: 25
Worksheet time: 25mins
Cations (+) are smaller than their atoms since you are removing valence electrons that are farther from the nucleus and anions (−) are larger than their atoms since adding extra electrons increases electron-electron repulsions.
True
False
The greater the electronegativity difference between 2 atoms, the more polar the bond becomes.
True
False
Real gases behave most like an ideal gas at high temperature and at low pressure. The more polar a gas is and the larger a gas is, the more it will deviate from ideal behavior. Consequently, small, nonpolar gases are the _______ ideal.
Most
Least
ΔH; feels hot; heat is a product; temperature goes up
Exothermic
Endothermic
What is the study of matter and how it changes?
Biology
Physics
Chemistry
Geology
The Periodic Table of Elements is most related to...
Chemistry
Geology
Astronomy
Biology
When calculating ΔH from chemical equations with known enthalpies, if you double reaction coefficients, what happens to the overall ΔH value?
it doubles
it is squared
the sign changes
nothing
When calculating ΔH from chemical equations with known enthalpies, if you reverse the reaction, what happens to the overall ΔH value?
the sign for ΔH changes
it doubles
it is squared
nothing
Which of these is false in terms of speeding up reactions?
Adding a catalyst lowers the activation energy
increasing reactant concentration increases collisions
increasing surface area decreases collisions
increasing temperature increases collisions
What happens to K if a reaction is reversed?
K
K2
2K
-K
If the pressure of a system is increased, which direction will equilibrium shift?
toward the side with less moles of gas
toward the side with more moles of gas
it will not shift
Which atom has the negative dipole in this molecule?
Hydrogen
Fluorine
Neither
In this molecule, Carbon has a formal charge of ____ and Nitrogen has a formal charge of _____.
0, 0
1, 0
0, -1
-1, 0
Combustion reactions produce what two substances?
Water Vapor and Carbon Dioxide
Carbon Dioxide and Oxygen
Oxygen and Water Vapor
Which of the following statements about ionization energy is true?
Ionization energy increases down a group.
Ionization energy decreases across a period.
Ionization energy increases across a period.
Ionization energy is the same for all elements.
What is the primary reason for the deviation of real gases from ideal behavior?
High temperature
Low pressure
Intermolecular forces
Small molecular size
In a chemical reaction, if the enthalpy change (ΔH) is negative, the reaction is:
Endothermic
Exothermic
Isothermal
Adiabatic
Which of the following elements has the highest electronegativity?
Fluorine
Oxygen
Chlorine
Nitrogen
What is the effect of a catalyst on the activation energy of a reaction?
Increases it
Decreases it
No effect
Doubles it
Which of the following is a characteristic of a polar covalent bond?
Equal sharing of electrons
Unequal sharing of electrons
Transfer of electrons
No sharing of electrons
What happens to the rate of a reaction if the concentration of reactants is increased?
The rate decreases
The rate increases
The rate remains the same
The rate becomes zero
Which gas law relates pressure and volume at constant temperature?
Boyle's Law
Charles's Law
Avogadro's Law
Ideal Gas Law
What is the main product of a complete combustion reaction involving a hydrocarbon?
Carbon monoxide
Carbon dioxide
Methane
Oxygen
Which of the following statements is true about the periodic table?
Elements are arranged by increasing atomic mass.
Elements are arranged by increasing atomic number.
Metals are located on the right side.
Nonmetals are located on the left side.
What is the effect of increasing temperature on the solubility of most solid solutes in water?
Solubility decreases
Solubility increases
Solubility remains the same
Solubility becomes zero
