Return to Blog
Homepage
PCAT Chemical Processes – H2O Hydrogen Bonds
- by
- Jan 03, 2018
- PCAT Question of the Day
Hydrogen bonds form between H2O molecules, but not H2S, H2Se, or H2Te. This explains why:
A) H2O is liquid at room temperature while the other compounds are gases.
B) H2O is more volatile than the other compounds.
C) H2O has the highest molecular weight of all four compounds.
D) H2O has a more distinct aroma than the other compounds.
Click for Explanation
Hydrogen bonds between H2O molecules will keep the molecules closer together than molecules lacking hydrogen bonds. Choice A is the best choice.
A) H2O is liquid at room temperature while the other compounds are gases, correct.
B) H2O is more volatile than the other compounds, incorrect, Hydrogen bonding will make the H2O less volatile than compounds that do not similarly hydrogen bond.
C) H2O has the highest molecular weight of all four compounds, incorrect, Molecular weight has nothing to do with hydrogen bonds.
D) H2O has a more distinct aroma than the other compounds, incorrect, Molecular aromas result from some functional groups and conjugated pi systems; aromas do not result from hydrogen bonding. Water is also odorless.
Related Post
Search the Blog
Free Consultation
Interested in our Online MCAT Course or one of our One-on-One MCAT Tutoring packages? Set up a free consultation with one of our experienced Academic Managers!
Schedule NowPopular Posts
-
-
-
-
-
MCAT Blog How to Review MCAT Full-Lengths
Free MCAT Practice Account
Need great MCAT practice?Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.
Learn More
Submit a Comment