Molecular and Ionic Bonding
If the concentration of reactants in a reaction at equilibrium is doubled, what effect does this have on the rate of the forward reaction?
It increases because there are more reactant molecules to collide with proper orientation.
It decreases due to an increase in activation energy required for the reaction.
It remains the same as rates are independent of concentrations at equilibrium.
It halves because doubling reactant concentration drives the equilibrium towards products.
Which type of intermolecular force is primarily responsible for the high boiling point of water compared to other molecular compounds with similar molar masses?
Covalent network bonding
London dispersion forces
Hydrogen bonds
Dipole-dipole interactions
Which intermolecular force is most significant in causing water molecules to exhibit high surface tension and boiling point?
Hydrogen bonds
Ion-dipole forces
Dipole-dipole interactions
Dispersion forces
Considering Gibbs Free Energy, how does temperature predominantly affect spontaneity within an endothermic chemical process?
By decreasing overall enthalpy changes making processes less spontaneous
By increasing thermal motion which favors product formation at high temps
By reducing kinetic barrier heights irrelevant to thermodynamic spontaneity
By increasing entropy only relevant above certain temperatures thresholds
Which term best describes a weak interaction occurring between the positive end of one polar molecule and the negative end of another?
Hydrogen Bond
Ionic Bond
Covalen Bond
Metalic Bond
What characteristic of hydrogen bonding among water molecules principally contributes to determining their role as a solvent during chemical reactions?
The ability to donate and accept protons facilitating solute-solvent interactions
The cohesiveness between water molecules reducing entropy changes upon dissolution
The dipole moment enhancing ion-dipole interactions with solutes
The molecular geometry providing maximal coverage around solutes
Which molecular shape would you expect for a molecule with four electron groups around the central atom and no lone pairs?
Linear
Tetrahedral
Bent
Trigonal planar

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What leads to greater bond dipoles?
Greater differences in atomic radii
Greater differences in electron affinity
Greater differences in ionization energy
Greater differences in electronegativity
In an aqueous solution how does sodium chloride behave when an electric current is passed through it?
It reacts with water to produce hydrogen gas and chlorine gas.
It dissociates into sodium and chloride ions that conduct electricity.
It remains unchanged and the solution becomes acidic.
It forms covalent bonds between sodium and chloride atoms preventing conduction.
Which molecule's properties are most affected by dipole-dipole interactions?
CO_2, a linear molecule where dipole moments cancel out resulting in no net dipole moment.
SO_2, a polar molecule with a bent shape causing a permanent dipole moment.
N_2, a nonpolar molecule with negligible dipole moments.
O_2, a nonpolar molecule with negligible dipole moments.