ETS MAJOR FIELD TEST BANK 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉ 1. Structural (constitutional) isomers
2. Stereoisomers (two types) - enantiomers and diasteromers
3. Geometric isomers (also known as cis and trans isomers). Answer:
What are the three types of isomers?
◉ different bonding arrangement of atoms. atoms are bonded together in
a different sequence. Answer: what is a structural (constitutional)
isomer?
◉ stereoisomers: atoms are bonded together in the same sequence, but
have different 3-D arrangement in space
enantiomers: non-superimposable mirror images
diasteromers: stereoisomers that are not enantiomers: not
superimposable and not mirror images. Answer: what is a stereoisomer?
what are the two types of stereoisomers?
◉ an atom that has four different groups attached to it. Answer: what is a
chiral atom?
, ◉ -R configuration - clockwise
-S configuration - counterclockwise. Answer: If a chiral atoms is in the
"R" configuration, in what direction does the arc go?
if a chiral atom is in the "S" configuration, in what direction does the arc
go?
◉ at least 2. Answer: how many chiral centers does a diastereomer need
to have?
◉ the larger the molecular weight, the lower the water solubility.
Answer: how does molecular weight relate to water-solubility?
◉ -increases water solubility
-alcohols, amines, C=O, ethers, and F. Answer: -How does the presence
of hydrogen-bonding change the water-solubility?
-What can hydrogen-bond with water?
◉ The more linear, the less water soluble, due to a greater non-polar
surface area than a branched molecule of the same molecular weight.
Answer: What shape of a molecule can make a substance less water-
soluble and why
◉ the larger the molecular weight, the higher the boiling point.. Answer:
How does molecular weight relate to boiling point?
WITH SOLUTIONS GRADED A+
◉ 1. Structural (constitutional) isomers
2. Stereoisomers (two types) - enantiomers and diasteromers
3. Geometric isomers (also known as cis and trans isomers). Answer:
What are the three types of isomers?
◉ different bonding arrangement of atoms. atoms are bonded together in
a different sequence. Answer: what is a structural (constitutional)
isomer?
◉ stereoisomers: atoms are bonded together in the same sequence, but
have different 3-D arrangement in space
enantiomers: non-superimposable mirror images
diasteromers: stereoisomers that are not enantiomers: not
superimposable and not mirror images. Answer: what is a stereoisomer?
what are the two types of stereoisomers?
◉ an atom that has four different groups attached to it. Answer: what is a
chiral atom?
, ◉ -R configuration - clockwise
-S configuration - counterclockwise. Answer: If a chiral atoms is in the
"R" configuration, in what direction does the arc go?
if a chiral atom is in the "S" configuration, in what direction does the arc
go?
◉ at least 2. Answer: how many chiral centers does a diastereomer need
to have?
◉ the larger the molecular weight, the lower the water solubility.
Answer: how does molecular weight relate to water-solubility?
◉ -increases water solubility
-alcohols, amines, C=O, ethers, and F. Answer: -How does the presence
of hydrogen-bonding change the water-solubility?
-What can hydrogen-bond with water?
◉ The more linear, the less water soluble, due to a greater non-polar
surface area than a branched molecule of the same molecular weight.
Answer: What shape of a molecule can make a substance less water-
soluble and why
◉ the larger the molecular weight, the higher the boiling point.. Answer:
How does molecular weight relate to boiling point?
