CHEM 162 MIDTERM 1 EXAM QUESTIONS WITH CORRECT ANSWERS

CHEM 162 MIDTERM 1 EXAM
QUESTIONS WITH CORRECT
ANSWERS

Bond Order - Correct Answers -(bonding + antibonding) / 2

paramagnetic - Correct Answers -unpaired electron on M.O. diagram

diamagnetic - Correct Answers -paired electron on M.O. diagram; no unpaired

hydrogen-bonding - Correct Answers -only if there are Hydrogen atoms on N, O, & F
and a lone pair on N, O or F as well

ion-ion - Correct Answers -only for negative and positive charges

Weak IMF - Correct Answers --low boiling point b/c easy to break bonds
-low freezing point
-high volatility
-high vapor pressure
-low viscosity
-low surface tension

Strong bond = short bond length - Correct Answers -Weak bond = long bond length

Order of strongest IMFs (weak - strong) - Correct Answers -Dispersion, dipole-dipole,
hydrogen bonding, ion bonding

Dispersion - Correct Answers --only for nonpolar molecules

Dipole-dipole - Correct Answers --only for polar molecules

Strong IMF - Correct Answers --high boiling point b/c hard to break bonds
-high freezing point
-low volatility
-low vapor pressure
-high viscosity
-high surface tension

volatility - Correct Answers -easy of evaporation