1. Use the four compounds below to answer the questions. Of the four chemicals shown below,
one is a gas, two are liquids and one is solid.
a. Rank the chemicals from MOST polar to LEAST polar
Answer:__________ __________ __________ ___________
most polar 2 nd
most polar 3 rd
most polar least polar
b. Which chemical has the greatest intermolecular interaction __________
c. Which compound(s) can undergo “hydrogen bonding”? __________
d. Which chemical is a ketone? __________
e. Which chemical is a gas at room temperature? __________
d. Which chemical is a solid at room temperature? __________
A. B. CH,-O-CH,CH ?-?-?-?-?-? ?? C. D. H O H CH(CH22CH H-C-C-C-H
Solution
A. B>D>A>C
Since ethylene glycol has more polar OH groups and alkane is least polar
B. Compound B has strong intermolecular interaction ie. Hydrogen bonding
C. Compound B undergoes intermolecular hydrogen bonding
D. Compound D is ketone. General formula of ketone is RCOR
E. Compound A is color less gas at room temperature
F. Option C, higher alkanes exist as waxy solid at room temperature.