Summative Test 1

Which of the following will be the solvent if a polar substance dissolves in an unknown liquid?

• Ionic

• Non-polar

• Polar

• Water

Which of the following is an example of non-polar molecule?

• O₃

• N₂

• ClBr₃

• SO₂

Which of the following is a common structure of a non-polar molecule?

• Bent

• Trigonal pyramidal

• Linear

• Trigonal planar

H_²O is a polar molecule.

• True

• False

Which of the following is the correct definition for electronegativity?

• the tendency to repel electrons

• the amount of energy required to remove an electron

• the tendency to attract bonded electrons

• the amount of energy released when electron is attached to an atom

Which bond forms when the difference in the electronegativity (ΔEN) is less than 0.5?

• polar covalent

• nonpolar covalent

• ionic

• none of the above

Which has the greatest tendency to bond electrons based on their electronegativity (EN) value?

• Nitrogen (EN = 3.0)

• Carbon (EN = 2.5)

• Oxygen (EN = 3.5)

• Fluorine (EN = 4.0)

Which of the following is TRUE of intermolecular forces?

• The forces that exist between molecules.

• The force that exist within molecules.

• The force that bonds hydrogen with oxygen.

• The strongest force in chemistry.

Which is the strongest intermolecular force below?

• Hydrogen bonding

• London dispersion force

• Ion–ion interaction

• Dipole–dipole interaction

Which of the following pertains to London dispersion forces?

• They are the weakest intermolecular force.

• They operate only in polar molecules.

• They operate only in ionic compounds.

• They are an attractive force between hydrogen and an electronegative atom.